Batting

Marcelo Mayer

Boston Red Sox (AAA)

Age: 22

Bats/Throws: L/R

6'3" / 188

DOB: 12/12/2002

(22 years, 4 months, 18 days)

Stats

Preseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring Training

Season	Team	Level	Age	G G - Games Played	PA PA - Plate Appearances	HR HR - Home Runs	R R - Runs	RBI RBI - Runs Batted In	SB SB - Stolen Bases	BB% BB% - Walk Percentage (BB/PA)	K% K% - Strikeout Percentage (SO/PA)	ISO ISO - Isolated Power (SLG-AVG)	BABIP BABIP - Batting Average on Balls in Play	AVG AVG - Batting Average (H/AB)	OBP OBP - On Base Percentage	SLG SLG - Slugging Percentage	wOBA wOBA - Weighted On Base Average (Linear Weights)	wRC+ wRC+ - Runs per PA scaled where 100 is average; both league and park adjusted; based on wOBA	BsR Base Running - Base running runs above average, includes SB or CS	Off Offense - Batting and Base Running combined (above average)	Def Defense - Fielding and Positional Adjustment combined (above average)	WAR WAR - Wins Above Replacement
2021	BOS	CPX	18	26	107	3	25	17	7	14.0%	25.2%	.165	.361	.275	.377	.440	.385	109
2022	BOS	A	19	66	308	9	46	40	16	16.6%	25.3%	.218	.375	.286	.406	.504	.417	144
2022	BOS	A+	19	25	116	4	15	13	1	14.7%	25.0%	.184	.338	.265	.379	.449	.376	126
2022	BOS	MiLB	19	91	424	13	61	53	17	16.0%	25.2%	.209	.365	.280	.399	.489	.406	139
2022	BOS	ST	19	4	5	0	0	0	0	20.0%	40.0%	.000	.000	.000	.200	.000	.142	-29
2023	BOS	A+	20	35	164	7	23	34	5	10.4%	22.6%	.234	.343	.290	.366	.524	.396	138
2023	BOS	AA	20	43	190	6	20	20	4	7.9%	25.8%	.166	.220	.189	.254	.355	.273	60
2023	BOS	MiLB	20	78	354	13	43	54	9	9.0%	24.3%	.197	.277	.236	.306	.433	.330	96
2023	BOS	ST	20	5	9	0	0	0	1	0.0%	11.1%	.111	.375	.333	.333	.444	.341	98
2024	BOS	AA	21	77	335	8	60	38	13	9.0%	19.7%	.173	.367	.307	.370	.480	.383	139
2024	BOS	ST	21	2	4	0	0	0	0	0.0%	25.0%	.250	.333	.250	.250	.500	.315	85
2025	BOS	ST	22	20	44	1	6	11	0	18.2%	25.0%	.194	.458	.333	.455	.528	.435	156
2025	FGDC	PROJ	22	11	49	1	6	5	1	7.0%	23.2%	.137	.302	.243	.300	.380	.296	86	0.0	-0.8	0.4	0.1
2025	Steamer	PROJ	22	17	70	1	8	7	1	7.1%	22.8%	.136	.305	.246	.304	.382	.300	89	0.0	-0.9	0.5	0.2
2025	ZiPS	PROJ	22	87	359	7	45	42	6	7.0%	23.7%	.137	.300	.240	.295	.377	.292	84	-0.2	-6.9	5.5	1.1
2025	ZiPS DC	PROJ	22	11	49	1	6	6	1	7.0%	23.7%	.137	.300	.240	.295	.377	.292	84	0.0	-0.9	0.5	0.1
2025	ATC	PROJ	22	19	77	2	9	8	2	7.1%	23.2%	.135	.305	.245	.300	.380	.297	87	0.0	-1.2	0.6	0.2
2025	THE BAT	PROJ	22	19	77	2	9	8	1	7.5%	24.2%	.145	.307	.245	.305	.390	.302	90	0.0	-0.8	0.6	0.2
2025	THE BAT X	PROJ	22	19	77	2	9	8	2	7.5%	24.1%	.145	.307	.245	.305	.390	.302	90	0.1	-0.7	0.6	0.2
2025	OOPSY	PROJ	22	11	49	1	5	6	1	7.8%	25.5%	.160	.306	.244	.304	.404	.307	94	0.0	-0.3	0.3	0.2
2025	BOS	AAA	22	24	107	7	17	34	1	6.5%	20.6%	.258	.271	.268	.318	.526	.365	118
2025	FGDC	ROS	22	25	108	3	12	12	2	6.9%	22.2%	.147	.299	.247	.303	.394	.307	92	-0.1	-1.0	-0.1	0.3
2025	Steamer	ROS		26	105	3	12	11	2	6.9%	22.2%	.147	.299	.247	.303	.394	.307	92	-0.1	-1.0	1.2	0.4
2025	ZiPS DC	ROS	22	25	108	2	13	13	2	7.0%	23.7%	.137	.300	.240	.295	.377	.297	85	-0.1	-1.8	0.2	0.2
2025	ATC DC	ROS	22	25	108	2	13	11	2	7.1%	23.2%	.135	.305	.245	.300	.380	.301	88	0.1	-1.3	-0.1	0.2
2025	THE BAT	ROS	22	25	107	3	13	13	2	7.4%	22.5%	.159	.305	.252	.310	.411	.316	99	0.0	-0.1	-0.1	0.4
2025	THE BAT X	ROS	22	25	107	3	13	13	2	7.4%	22.5%	.160	.305	.252	.310	.412	.317	99	0.1	0.1	-0.1	0.4
2025	OOPSY	ROS	22	25	108	3	12	14	2	7.4%	25.5%	.171	.306	.248	.303	.419	.316	99	0.0	-0.1	0.1	0.4

Season	Team	Level	Age	G G - Games Played	PA PA - Plate Appearances	HR HR - Home Runs	R R - Runs	RBI RBI - Runs Batted In	SB SB - Stolen Bases	BB% BB% - Walk Percentage (BB/PA)	K% K% - Strikeout Percentage (SO/PA)	ISO ISO - Isolated Power (SLG-AVG)	BABIP BABIP - Batting Average on Balls in Play	AVG AVG - Batting Average (H/AB)	OBP OBP - On Base Percentage	SLG SLG - Slugging Percentage	wOBA wOBA - Weighted On Base Average (Linear Weights)	wRC+ wRC+ - Runs per PA scaled where 100 is average; both league and park adjusted; based on wOBA	BsR Base Running - Base running runs above average, includes SB or CS	Off Offense - Batting and Base Running combined (above average)	Def Defense - Fielding and Positional Adjustment combined (above average)	WAR WAR - Wins Above Replacement
2021	BOS	CPX	18	26	107	3	25	17	7	14.0%	25.2%	.165	.361	.275	.377	.440	.385	109
2022	BOS	A	19	66	308	9	46	40	16	16.6%	25.3%	.218	.375	.286	.406	.504	.417	144
2022	BOS	A+	19	25	116	4	15	13	1	14.7%	25.0%	.184	.338	.265	.379	.449	.376	126
2022	BOS	MiLB	19	91	424	13	61	53	17	16.0%	25.2%	.209	.365	.280	.399	.489	.406	139
2022	BOS	ST	19	4	5	0	0	0	0	20.0%	40.0%	.000	.000	.000	.200	.000	.142	-29
2023	BOS	A+	20	35	164	7	23	34	5	10.4%	22.6%	.234	.343	.290	.366	.524	.396	138
2023	BOS	AA	20	43	190	6	20	20	4	7.9%	25.8%	.166	.220	.189	.254	.355	.273	60
2023	BOS	MiLB	20	78	354	13	43	54	9	9.0%	24.3%	.197	.277	.236	.306	.433	.330	96
2023	BOS	ST	20	5	9	0	0	0	1	0.0%	11.1%	.111	.375	.333	.333	.444	.341	98
2024	BOS	AA	21	77	335	8	60	38	13	9.0%	19.7%	.173	.367	.307	.370	.480	.383	139
2024	BOS	ST	21	2	4	0	0	0	0	0.0%	25.0%	.250	.333	.250	.250	.500	.315	85
2025	BOS	ST	22	20	44	1	6	11	0	18.2%	25.0%	.194	.458	.333	.455	.528	.435	156
2025	FGDC	PROJ	22	11	49	1	6	5	1	7.0%	23.2%	.137	.302	.243	.300	.380	.296	86	0.0	-0.8	0.4	0.1
2025	Steamer	PROJ	22	17	70	1	8	7	1	7.1%	22.8%	.136	.305	.246	.304	.382	.300	89	0.0	-0.9	0.5	0.2
2025	ZiPS	PROJ	22	87	359	7	45	42	6	7.0%	23.7%	.137	.300	.240	.295	.377	.292	84	-0.2	-6.9	5.5	1.1
2025	ZiPS DC	PROJ	22	11	49	1	6	6	1	7.0%	23.7%	.137	.300	.240	.295	.377	.292	84	0.0	-0.9	0.5	0.1
2025	ATC	PROJ	22	19	77	2	9	8	2	7.1%	23.2%	.135	.305	.245	.300	.380	.297	87	0.0	-1.2	0.6	0.2
2025	THE BAT	PROJ	22	19	77	2	9	8	1	7.5%	24.2%	.145	.307	.245	.305	.390	.302	90	0.0	-0.8	0.6	0.2
2025	THE BAT X	PROJ	22	19	77	2	9	8	2	7.5%	24.1%	.145	.307	.245	.305	.390	.302	90	0.1	-0.7	0.6	0.2
2025	OOPSY	PROJ	22	11	49	1	5	6	1	7.8%	25.5%	.160	.306	.244	.304	.404	.307	94	0.0	-0.3	0.3	0.2
2025	BOS	AAA	22	24	107	7	17	34	1	6.5%	20.6%	.258	.271	.268	.318	.526	.365	118
2025	FGDC	ROS	22	25	108	3	12	12	2	6.9%	22.2%	.147	.299	.247	.303	.394	.307	92	-0.1	-1.0	-0.1	0.3
2025	Steamer	ROS		26	105	3	12	11	2	6.9%	22.2%	.147	.299	.247	.303	.394	.307	92	-0.1	-1.0	1.2	0.4
2025	ZiPS DC	ROS	22	25	108	2	13	13	2	7.0%	23.7%	.137	.300	.240	.295	.377	.297	85	-0.1	-1.8	0.2	0.2
2025	ATC DC	ROS	22	25	108	2	13	11	2	7.1%	23.2%	.135	.305	.245	.300	.380	.301	88	0.1	-1.3	-0.1	0.2
2025	THE BAT	ROS	22	25	107	3	13	13	2	7.4%	22.5%	.159	.305	.252	.310	.411	.316	99	0.0	-0.1	-0.1	0.4
2025	THE BAT X	ROS	22	25	107	3	13	13	2	7.4%	22.5%	.160	.305	.252	.310	.412	.317	99	0.1	0.1	-0.1	0.4
2025	OOPSY	ROS	22	25	108	3	12	14	2	7.4%	25.5%	.171	.306	.248	.303	.419	.316	99	0.0	-0.1	0.1	0.4

Preseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring Training

Season	Team	Level	G G - Games Played	AB AB - At Bats	PA PA - Plate Appearances	H H - Hits	1B 1B - Singles	2B 2B - Doubles	3B 3B - Triples	HR HR - Home Runs	R R - Runs	RBI RBI - Runs Batted In	BB BB - Walks	IBB IBB - Intentional Walks	SO SO - Strike Outs	HBP HBP - Hit by Pitch	SF SF - Sacrifice Fly	GDP GDP - Ground into Double Play	SB SB - Stolen Bases	CS CS - Caught Stealing	AVG AVG - Batting Average (H/AB)
2021	BOS	CPX	26	91	107	25	17	4	1	3	25	17	15	0	27	0	0	1	7	1	.275
2022	BOS	A	66	252	308	72	36	26	1	9	46	40	51	2	78	2	3	4	16	0	.286
2022	BOS	A+	25	98	116	26	17	4	1	4	15	13	17	1	29	1	0	3	1	0	.265
2022	BOS	MiLB	91	350	424	98	53	30	2	13	61	53	68	3	107	3	3	7	17	0	.280
2022	BOS	ST	4	4	5	0	0	0	0	0	0	0	1	0	2	0	0	0	0	0	.000
2023	BOS	A+	35	145	164	42	23	11	1	7	23	34	17	0	37	1	1	3	5	2	.290
2023	BOS	AA	43	169	190	32	17	8	1	6	20	20	15	0	49	1	4	1	4	3	.189
2023	BOS	MiLB	78	314	354	74	40	19	2	13	43	54	32	0	86	2	5	4	9	5	.236
2023	BOS	ST	5	9	9	3	2	1	0	0	0	0	0	0	1	0	0	0	1	0	.333
2024	BOS	AA	77	300	335	92	56	28	0	8	60	38	30	1	66	2	3	6	13	2	.307
2024	BOS	ST	2	4	4	1	0	1	0	0	0	0	0	0	1	0	0	0	0	0	.250
2025	BOS	ST	20	36	44	12	9	0	2	1	6	11	8	0	11	0	0	0	0	0	.333
2025	FGDC	PROJ	11	45	49	11	7	3	0	1	6	5	3	0	11	0	0		1	0	.243
2025	Steamer	PROJ	17	64	70	16	10	4	0	1	8	7	5	0	16	1	0		1	0	.246
2025	ZiPS	PROJ	87	329	359	79	50	20	2	7	45	42	25	1	85	2	3	6	6	2	.240
2025	ZiPS DC	PROJ	11	45	49	11	7	3	0	1	6	6	3	0	12	0	0		1	0	.240
2025	ATC	PROJ	19	71	77	17	11	5	0	2	9	8	5	0	18	0	0	1	2	0	.245
2025	THE BAT	PROJ	19	70	77	17	11	4	0	2	9	8	6	0	19	0	0	1	1	0	.245
2025	THE BAT X	PROJ	19	70	77	17	11	4	0	2	9	8	6	0	19	0	0	1	2	0	.245
2025	OOPSY	PROJ	11	45	49	11	7	3	0	1	5	6	4	0	12	0	0		1	0	.244
2025	BOS	AAA	24	97	107	26	15	4	0	7	17	34	7	1	22	1	2	0	1	0	.268
2025	FGDC	ROS	25	98	108	24	15	6	0	3	12	12	7	0	24	1	1		2	0	.247
2025	Steamer	ROS	26	96	105	24	15	6	0	3	12	11	7	0	23	1	1		2	0	.247
2025	ZiPS DC	ROS	25	99	108	24	15	6	1	2	13	13	7	0	25	1	1		2	1	.240
2025	ATC DC	ROS	25	99	108	24	15	6	0	2	13	11	8	0	25	0	0		2	0	.245
2025	THE BAT	ROS	25	98	107	25	15	6	0	3	13	13	8	1	24	1	1	2	2	1	.252
2025	THE BAT X	ROS	25	98	107	25	15	6	0	3	13	13	8	1	24	1	1	2	2	0	.252
2025	OOPSY	ROS	25	98	108	24	14	6	0	3	12	14	8	0	27	0	1		2	0	.248

Season	Team	Level	G G - Games Played	AB AB - At Bats	PA PA - Plate Appearances	H H - Hits	1B 1B - Singles	2B 2B - Doubles	3B 3B - Triples	HR HR - Home Runs	R R - Runs	RBI RBI - Runs Batted In	BB BB - Walks	IBB IBB - Intentional Walks	SO SO - Strike Outs	HBP HBP - Hit by Pitch	SF SF - Sacrifice Fly	GDP GDP - Ground into Double Play	SB SB - Stolen Bases	CS CS - Caught Stealing	AVG AVG - Batting Average (H/AB)
2021	BOS	CPX	26	91	107	25	17	4	1	3	25	17	15	0	27	0	0	1	7	1	.275
2022	BOS	A	66	252	308	72	36	26	1	9	46	40	51	2	78	2	3	4	16	0	.286
2022	BOS	A+	25	98	116	26	17	4	1	4	15	13	17	1	29	1	0	3	1	0	.265
2022	BOS	MiLB	91	350	424	98	53	30	2	13	61	53	68	3	107	3	3	7	17	0	.280
2022	BOS	ST	4	4	5	0	0	0	0	0	0	0	1	0	2	0	0	0	0	0	.000
2023	BOS	A+	35	145	164	42	23	11	1	7	23	34	17	0	37	1	1	3	5	2	.290
2023	BOS	AA	43	169	190	32	17	8	1	6	20	20	15	0	49	1	4	1	4	3	.189
2023	BOS	MiLB	78	314	354	74	40	19	2	13	43	54	32	0	86	2	5	4	9	5	.236
2023	BOS	ST	5	9	9	3	2	1	0	0	0	0	0	0	1	0	0	0	1	0	.333
2024	BOS	AA	77	300	335	92	56	28	0	8	60	38	30	1	66	2	3	6	13	2	.307
2024	BOS	ST	2	4	4	1	0	1	0	0	0	0	0	0	1	0	0	0	0	0	.250
2025	BOS	ST	20	36	44	12	9	0	2	1	6	11	8	0	11	0	0	0	0	0	.333
2025	FGDC	PROJ	11	45	49	11	7	3	0	1	6	5	3	0	11	0	0		1	0	.243
2025	Steamer	PROJ	17	64	70	16	10	4	0	1	8	7	5	0	16	1	0		1	0	.246
2025	ZiPS	PROJ	87	329	359	79	50	20	2	7	45	42	25	1	85	2	3	6	6	2	.240
2025	ZiPS DC	PROJ	11	45	49	11	7	3	0	1	6	6	3	0	12	0	0		1	0	.240
2025	ATC	PROJ	19	71	77	17	11	5	0	2	9	8	5	0	18	0	0	1	2	0	.245
2025	THE BAT	PROJ	19	70	77	17	11	4	0	2	9	8	6	0	19	0	0	1	1	0	.245
2025	THE BAT X	PROJ	19	70	77	17	11	4	0	2	9	8	6	0	19	0	0	1	2	0	.245
2025	OOPSY	PROJ	11	45	49	11	7	3	0	1	5	6	4	0	12	0	0		1	0	.244
2025	BOS	AAA	24	97	107	26	15	4	0	7	17	34	7	1	22	1	2	0	1	0	.268
2025	FGDC	ROS	25	98	108	24	15	6	0	3	12	12	7	0	24	1	1		2	0	.247
2025	Steamer	ROS	26	96	105	24	15	6	0	3	12	11	7	0	23	1	1		2	0	.247
2025	ZiPS DC	ROS	25	99	108	24	15	6	1	2	13	13	7	0	25	1	1		2	1	.240
2025	ATC DC	ROS	25	99	108	24	15	6	0	2	13	11	8	0	25	0	0		2	0	.245
2025	THE BAT	ROS	25	98	107	25	15	6	0	3	13	13	8	1	24	1	1	2	2	1	.252
2025	THE BAT X	ROS	25	98	107	25	15	6	0	3	13	13	8	1	24	1	1	2	2	0	.252
2025	OOPSY	ROS	25	98	108	24	14	6	0	3	12	14	8	0	27	0	1		2	0	.248

Preseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring TrainingAverages

Season	Team	Level	BB% BB% - Walk Percentage (BB/PA)	K% K% - Strikeout Percentage (SO/PA)	BB/K BB/K - Walk to Strikeout Ratio (BB/SO)	AVG AVG - Batting Average (H/AB)	OBP OBP - On Base Percentage	SLG SLG - Slugging Percentage	OPS OPS - On Base + Slugging Percentage	ISO ISO - Isolated Power (SLG-AVG)	Spd Spd - Speed Score (4 Component Version)	BABIP BABIP - Batting Average on Balls in Play	UBR UBR - Ultimate Base Running in runs above average, does not include SB or CS	wSB wSB - Stolen Bases and Caught Stealing runs above average	wRC wRC - Runs Created based wOBA	wRAA wRAA - Runs Above Average based on wOBA	wOBA wOBA - Weighted On Base Average (Linear Weights)	wRC+ wRC+ - Runs per PA scaled where 100 is average; both league and park adjusted; based on wOBA
2021	BOS	CPX	14.0%	25.2%	0.56	.275	.377	.440	.817	.165	8.4	.361		0.8	19	3.2	.385	109
2022	BOS	A	16.6%	25.3%	0.65	.286	.406	.504	.910	.218	6.4	.375		2.2	60	19.9	.417	144
2022	BOS	A+	14.7%	25.0%	0.59	.265	.379	.449	.828	.184	4.9	.338		-0.1	19	4.1	.376	126
2022	BOS	MiLB	16.0%	25.2%	0.64	.280	.399	.489	.887	.209	6.3	.365		2.2	79	24.0	.406	139
2022	BOS	ST	20.0%	40.0%	0.50	.000	.200	.000	.200	.000	0.1	.000		0.0	0	-0.9	.142	-29
2023	BOS	A+	10.4%	22.6%	0.46	.290	.366	.524	.890	.234	5.3	.343		-0.2	30	8.4	.396	138
2023	BOS	AA	7.9%	25.8%	0.31	.189	.254	.355	.609	.166	5.1	.220		-0.8	15	-8.6	.273	60
2023	BOS	MiLB	9.0%	24.3%	0.37	.236	.306	.433	.739	.197	5.2	.277		-1.0	45	-0.2	.330	96
2023	BOS	ST	0.0%	11.1%	0.00	.333	.333	.444	.778	.111	5.0	.375		0.2	1	0.0	.341	98
2024	BOS	AA	9.0%	19.7%	0.45	.307	.370	.480	.850	.173	5.6	.367		1.0	56	16.5	.383	139
2024	BOS	ST	0.0%	25.0%	0.00	.250	.250	.500	.750	.250	0.1	.333		0.0	0	-0.1	.315	85
2025	BOS	ST	18.2%	25.0%	0.73	.333	.455	.528	.982	.194	3.7	.458		-0.1	10	3.6	.435	156
2025	FGDC	PROJ	7.0%	23.2%	0.30	.243	.300	.380	.679	.137	5.0	.302	0.0	0.0	5	-0.6	.296	86
2025	Steamer	PROJ	7.1%	22.8%	0.31	.246	.304	.382	.687	.136	4.4	.305	0.0	0.0	8	-0.6	.300	89
2025	ZiPS	PROJ	7.0%	23.7%	0.29	.240	.295	.377	.672	.137	5.4	.300		-0.2	37	-5.1	.292	84
2025	ZiPS DC	PROJ	7.0%	23.7%	0.29	.240	.295	.377	.672	.137	5.4	.300	0.0	0.0	5	-0.7	.292	84
2025	ATC	PROJ	7.1%	23.2%	0.31	.245	.300	.380	.680	.135	5.0	.305	-0.1	0.1	8	-0.8	.297	87
2025	THE BAT	PROJ	7.5%	24.2%	0.31	.245	.305	.390	.695	.145	5.0	.307		0.0	8	-0.5	.302	90
2025	THE BAT X	PROJ	7.5%	24.1%	0.31	.245	.305	.390	.695	.145	5.3	.307		0.1	8	-0.5	.302	90
2025	OOPSY	PROJ	7.8%	25.5%	0.31	.244	.304	.404	.708	.160	4.8	.306	0.0	0.0	6	-0.1	.307	94
2025	BOS	AAA	6.5%	20.6%	0.32	.268	.318	.526	.844	.258	4.0	.271		0.0	16	2.4	.365	118
2025	FGDC	ROS	6.9%	22.2%	0.31	.247	.303	.394	.697	.147	4.2	.299	0.0	0.0	12	-0.6	.307	92
2025	Steamer	ROS	6.9%	22.2%	0.31	.247	.303	.394	.697	.147	4.2	.299	0.0	0.0	12	-0.6	.307	92
2025	ZiPS DC	ROS	7.0%	23.7%	0.29	.240	.295	.377	.672	.137	5.4	.300	0.0	-0.1	11	-1.5	.297	85
2025	ATC DC	ROS	7.1%	23.2%	0.31	.245	.300	.380	.680	.135	5.0	.305	0.0	0.1	11	-1.1	.301	88
2025	THE BAT	ROS	7.4%	22.5%	0.33	.252	.310	.411	.722	.159	5.1	.305		0.0	13	0.2	.316	99
2025	THE BAT X	ROS	7.4%	22.5%	0.33	.252	.310	.412	.722	.160	5.3	.305		0.1	13	0.2	.317	99
2025	OOPSY	ROS	7.4%	25.5%	0.29	.248	.303	.419	.722	.171	4.5	.306	0.0	0.0	13	0.2	.316	99

Season	Team	Level	BB% BB% - Walk Percentage (BB/PA)	K% K% - Strikeout Percentage (SO/PA)	BB/K BB/K - Walk to Strikeout Ratio (BB/SO)	AVG AVG - Batting Average (H/AB)	OBP OBP - On Base Percentage	SLG SLG - Slugging Percentage	OPS OPS - On Base + Slugging Percentage	ISO ISO - Isolated Power (SLG-AVG)	Spd Spd - Speed Score (4 Component Version)	BABIP BABIP - Batting Average on Balls in Play	UBR UBR - Ultimate Base Running in runs above average, does not include SB or CS	wSB wSB - Stolen Bases and Caught Stealing runs above average	wRC wRC - Runs Created based wOBA	wRAA wRAA - Runs Above Average based on wOBA	wOBA wOBA - Weighted On Base Average (Linear Weights)	wRC+ wRC+ - Runs per PA scaled where 100 is average; both league and park adjusted; based on wOBA
2021	BOS	CPX	14.0%	25.2%	0.56	.275	.377	.440	.817	.165	8.4	.361		0.8	19	3.2	.385	109
2022	BOS	A	16.6%	25.3%	0.65	.286	.406	.504	.910	.218	6.4	.375		2.2	60	19.9	.417	144
2022	BOS	A+	14.7%	25.0%	0.59	.265	.379	.449	.828	.184	4.9	.338		-0.1	19	4.1	.376	126
2022	BOS	MiLB	16.0%	25.2%	0.64	.280	.399	.489	.887	.209	6.3	.365		2.2	79	24.0	.406	139
2022	BOS	ST	20.0%	40.0%	0.50	.000	.200	.000	.200	.000	0.1	.000		0.0	0	-0.9	.142	-29
2023	BOS	A+	10.4%	22.6%	0.46	.290	.366	.524	.890	.234	5.3	.343		-0.2	30	8.4	.396	138
2023	BOS	AA	7.9%	25.8%	0.31	.189	.254	.355	.609	.166	5.1	.220		-0.8	15	-8.6	.273	60
2023	BOS	MiLB	9.0%	24.3%	0.37	.236	.306	.433	.739	.197	5.2	.277		-1.0	45	-0.2	.330	96
2023	BOS	ST	0.0%	11.1%	0.00	.333	.333	.444	.778	.111	5.0	.375		0.2	1	0.0	.341	98
2024	BOS	AA	9.0%	19.7%	0.45	.307	.370	.480	.850	.173	5.6	.367		1.0	56	16.5	.383	139
2024	BOS	ST	0.0%	25.0%	0.00	.250	.250	.500	.750	.250	0.1	.333		0.0	0	-0.1	.315	85
2025	BOS	ST	18.2%	25.0%	0.73	.333	.455	.528	.982	.194	3.7	.458		-0.1	10	3.6	.435	156
2025	FGDC	PROJ	7.0%	23.2%	0.30	.243	.300	.380	.679	.137	5.0	.302	0.0	0.0	5	-0.6	.296	86
2025	Steamer	PROJ	7.1%	22.8%	0.31	.246	.304	.382	.687	.136	4.4	.305	0.0	0.0	8	-0.6	.300	89
2025	ZiPS	PROJ	7.0%	23.7%	0.29	.240	.295	.377	.672	.137	5.4	.300		-0.2	37	-5.1	.292	84
2025	ZiPS DC	PROJ	7.0%	23.7%	0.29	.240	.295	.377	.672	.137	5.4	.300	0.0	0.0	5	-0.7	.292	84
2025	ATC	PROJ	7.1%	23.2%	0.31	.245	.300	.380	.680	.135	5.0	.305	-0.1	0.1	8	-0.8	.297	87
2025	THE BAT	PROJ	7.5%	24.2%	0.31	.245	.305	.390	.695	.145	5.0	.307		0.0	8	-0.5	.302	90
2025	THE BAT X	PROJ	7.5%	24.1%	0.31	.245	.305	.390	.695	.145	5.3	.307		0.1	8	-0.5	.302	90
2025	OOPSY	PROJ	7.8%	25.5%	0.31	.244	.304	.404	.708	.160	4.8	.306	0.0	0.0	6	-0.1	.307	94
2025	BOS	AAA	6.5%	20.6%	0.32	.268	.318	.526	.844	.258	4.0	.271		0.0	16	2.4	.365	118
2025	FGDC	ROS	6.9%	22.2%	0.31	.247	.303	.394	.697	.147	4.2	.299	0.0	0.0	12	-0.6	.307	92
2025	Steamer	ROS	6.9%	22.2%	0.31	.247	.303	.394	.697	.147	4.2	.299	0.0	0.0	12	-0.6	.307	92
2025	ZiPS DC	ROS	7.0%	23.7%	0.29	.240	.295	.377	.672	.137	5.4	.300	0.0	-0.1	11	-1.5	.297	85
2025	ATC DC	ROS	7.1%	23.2%	0.31	.245	.300	.380	.680	.135	5.0	.305	0.0	0.1	11	-1.1	.301	88
2025	THE BAT	ROS	7.4%	22.5%	0.33	.252	.310	.411	.722	.159	5.1	.305		0.0	13	0.2	.316	99
2025	THE BAT X	ROS	7.4%	22.5%	0.33	.252	.310	.412	.722	.160	5.3	.305		0.1	13	0.2	.317	99
2025	OOPSY	ROS	7.4%	25.5%	0.29	.248	.303	.419	.722	.171	4.5	.306	0.0	0.0	13	0.2	.316	99

Preseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring Training

Season	Team	Level	Events Events - The number of Batted Balls (PA - SO - BB - HBP)	EV EV - Exit Velocity (mph) - Speed of the baseball as it comes off the bat	maxEV maxEV - Maximum Exit Velocity (mph) - Highest speed of a ball off the bat.	LA LA - Launch Angle (degree) - Vertical direction of the ball as it leaves the bat	Barrels Barrels - A batted ball with comparable hit types (in terms of exit velocity and launch angle) have led to a minimum .500 batting average and 1.500 slugging percentage	Barrel% Barrel% - Percentage of batted balls that are classified as barrels	HardHit HardHit - Number of batted balls with exit velocity of 95 mph or higher	HardHit% HardHit% - Percentage of batted balls with exit velocity of 95 mph or higher	divider	AVG AVG - Batting Average (H/AB)	xBA xBA - Expected batting average	divider	SLG SLG - Slugging Percentage	xSLG xSLG - Expected slugging percentage	divider	wOBA wOBA - Weighted On Base Average (Linear Weights)	xwOBA xwOBA - Expected weighted on-base average
2025	BOS	AAA	77	91.7	111.2	12.9			40	51.9%		.268			.526			.365

Season	Team	Level	Events Events - The number of Batted Balls (PA - SO - BB - HBP)	EV EV - Exit Velocity (mph) - Speed of the baseball as it comes off the bat	maxEV maxEV - Maximum Exit Velocity (mph) - Highest speed of a ball off the bat.	LA LA - Launch Angle (degree) - Vertical direction of the ball as it leaves the bat	Barrels Barrels - A batted ball with comparable hit types (in terms of exit velocity and launch angle) have led to a minimum .500 batting average and 1.500 slugging percentage	Barrel% Barrel% - Percentage of batted balls that are classified as barrels	HardHit HardHit - Number of batted balls with exit velocity of 95 mph or higher	HardHit% HardHit% - Percentage of batted balls with exit velocity of 95 mph or higher	divider	AVG AVG - Batting Average (H/AB)	xBA xBA - Expected batting average	divider	SLG SLG - Slugging Percentage	xSLG xSLG - Expected slugging percentage	divider	wOBA wOBA - Weighted On Base Average (Linear Weights)	xwOBA xwOBA - Expected weighted on-base average
2025	BOS	AAA	77	91.7	111.2	12.9			40	51.9%		.268			.526			.365

Marcelo Mayer

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BAL	CHW	ATH
BOS	CLE	HOU
NYY	DET	LAA
TBR	KCR	SEA
TOR	MIN	TEX

ATL	CHC	ARI
MIA	CIN	COL
NYM	MIL	LAD
PHI	PIT	SDP
WSN	STL	SFG