Naimer Rosario
Arizona Diamondbacks (DSL)P
Age: 19
Bats/Throws: L/L
6'0" / 160
DOB: 7/18/2006
(19 years, 8 months, 15 days)
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Preseason ProjectionsIn-Season ProjectionsMinor Leagues
| Season | Team | Level | Age | W W - Wins | L L - Losses | SV SV - Saves | G G - Games Pitched | GS GS - Games Started | IP IP - Innings Pitched | divider | K/9 K/9 - Strikeouts per 9 Innings ((SO*9)/IP) | BB/9 BB/9 - Walks per 9 Innings ((BB*9)/IP) | HR/9 HR/9 - Home Runs per 9 Innings ((HR*9)/IP) | BABIP BABIP - Batting Average on Balls in Play | LOB% LOB% - Left on Base Percentage | GB% GB% - Ground Ball Percentage (GB/BIP) | HR/FB HR/FB - Home Run to Fly Ball Ratio | divider | vFA vFA - Fourseam Fastball velocity (Pitch Info) | divider | ERA ERA - Earned Run Average ((ER*9)/IP) | xERA xERA - Expected ERA | FIP FIP - Fielder Independent Pitching on an ERA scale | xFIP xFIP - Expected Fielder Independent Pitching where Home Runs are calculated as 10.5% of Fly Balls induced | WAR WAR - Wins Above Replacement |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | ARI | DSL | 17 | 3 | 2 | 2 | 9 | 2 | 23.2 | 9.51 | 6.46 | 0.00 | .220 | 65.7% | 37.9% | 0.0% | 4.18 | 4.65 | 5.13 | ||||||
| 2024 | ARI | DSL | 17 | 0 | 1 | 0 | 3 | 3 | 12.0 | 10.50 | 3.75 | 0.00 | .370 | 72.2% | 44.4% | 0.0% | 3.75 | 3.64 | 4.07 | ||||||
| 2024 | ARI | MiLB | 17 | 3 | 3 | 2 | 12 | 5 | 35.2 | 9.84 | 5.55 | 0.00 | .267 | 67.9% | 40.0% | 0.0% | 4.04 | 4.31 | 4.77 | ||||||
| 2025 | ARI | DSL | 18 | 5 | 1 | 0 | 8 | 8 | 40.2 | 8.41 | 2.43 | 0.00 | .233 | 72.5% | 43.0% | 0.0% | 2.21 | 3.34 | 3.97 | ||||||
| 2025 | ARI | DSL | 18 | 0 | 1 | 0 | 4 | 4 | 19.1 | 12.10 | 2.33 | 0.47 | .308 | 64.5% | 58.3% | 12.5% | 3.72 | 3.10 | 2.71 | ||||||
| 2025 | ARI | MiLB | 18 | 5 | 2 | 0 | 12 | 12 | 60.0 | 9.60 | 2.40 | 0.15 | .254 | 70.0% | 47.5% | 2.2% | 2.70 | 3.27 | 3.56 | ||||||
| 2026 | Steamer | PROJ | 19 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4.65 | 6.65 | 1.48 | .297 | 68.4% | 41.5% | 6.41 | 6.61 | 6.53 | 0.0 | ||||||
| 2026 | Steamer | ROS | 19 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4.80 | 6.81 | 1.45 | .296 | 68.6% | 6.38 | 6.60 | 0.0 |
| Season | Team | Level | Age | W W - Wins | L L - Losses | SV SV - Saves | G G - Games Pitched | GS GS - Games Started | IP IP - Innings Pitched | divider | K/9 K/9 - Strikeouts per 9 Innings ((SO*9)/IP) | BB/9 BB/9 - Walks per 9 Innings ((BB*9)/IP) | HR/9 HR/9 - Home Runs per 9 Innings ((HR*9)/IP) | BABIP BABIP - Batting Average on Balls in Play | LOB% LOB% - Left on Base Percentage | GB% GB% - Ground Ball Percentage (GB/BIP) | HR/FB HR/FB - Home Run to Fly Ball Ratio | divider | vFA vFA - Fourseam Fastball velocity (Pitch Info) | divider | ERA ERA - Earned Run Average ((ER*9)/IP) | xERA xERA - Expected ERA | FIP FIP - Fielder Independent Pitching on an ERA scale | xFIP xFIP - Expected Fielder Independent Pitching where Home Runs are calculated as 10.5% of Fly Balls induced | WAR WAR - Wins Above Replacement |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | ARI | DSL | 17 | 3 | 2 | 2 | 9 | 2 | 23.2 | 9.51 | 6.46 | 0.00 | .220 | 65.7% | 37.9% | 0.0% | 4.18 | 4.65 | 5.13 | ||||||
| 2024 | ARI | DSL | 17 | 0 | 1 | 0 | 3 | 3 | 12.0 | 10.50 | 3.75 | 0.00 | .370 | 72.2% | 44.4% | 0.0% | 3.75 | 3.64 | 4.07 | ||||||
| 2024 | ARI | MiLB | 17 | 3 | 3 | 2 | 12 | 5 | 35.2 | 9.84 | 5.55 | 0.00 | .267 | 67.9% | 40.0% | 0.0% | 4.04 | 4.31 | 4.77 | ||||||
| 2025 | ARI | DSL | 18 | 5 | 1 | 0 | 8 | 8 | 40.2 | 8.41 | 2.43 | 0.00 | .233 | 72.5% | 43.0% | 0.0% | 2.21 | 3.34 | 3.97 | ||||||
| 2025 | ARI | DSL | 18 | 0 | 1 | 0 | 4 | 4 | 19.1 | 12.10 | 2.33 | 0.47 | .308 | 64.5% | 58.3% | 12.5% | 3.72 | 3.10 | 2.71 | ||||||
| 2025 | ARI | MiLB | 18 | 5 | 2 | 0 | 12 | 12 | 60.0 | 9.60 | 2.40 | 0.15 | .254 | 70.0% | 47.5% | 2.2% | 2.70 | 3.27 | 3.56 | ||||||
| 2026 | Steamer | PROJ | 19 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4.65 | 6.65 | 1.48 | .297 | 68.4% | 41.5% | 6.41 | 6.61 | 6.53 | 0.0 | ||||||
| 2026 | Steamer | ROS | 19 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4.80 | 6.81 | 1.45 | .296 | 68.6% | 6.38 | 6.60 | 0.0 |
Preseason ProjectionsIn-Season ProjectionsMinor Leagues
| Season | Team | Level | W W - Wins | L L - Losses | ERA ERA - Earned Run Average ((ER*9)/IP) | G G - Games Pitched | GS GS - Games Started | QS QS - Quality Starts; pitched at least 6 innings and gave up 3 or fewer earned runs | CG CG - Complete Games | ShO ShO - Shoutouts | SV SV - Saves | HLD HLD - Holds | BS BS - Blown Saves | IP IP - Innings Pitched | TBF TBF - Total Batters Faced | H H - Hits Allowed | R R - Runs Allowed | ER ER - Earned Runs | HR HR - Home Runs | BB BB - Walks | IBB IBB - Intentional | HBP HBP - Hit Batters | WP WP - Wild Pitches | BK BK - Balks | SO SO - Strikeouts |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | ARI | DSL | 3 | 2 | 4.18 | 9 | 2 | 0 | 0 | 2 | 1 | 0 | 23.2 | 106 | 13 | 12 | 11 | 0 | 17 | 0 | 5 | 4 | 0 | 25 | |
| 2024 | ARI | DSL | 0 | 1 | 3.75 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 12.0 | 49 | 10 | 5 | 5 | 0 | 5 | 0 | 3 | 1 | 2 | 14 | |
| 2024 | ARI | MiLB | 3 | 3 | 4.04 | 12 | 5 | 0 | 0 | 2 | 1 | 0 | 35.2 | 155 | 23 | 17 | 16 | 0 | 22 | 0 | 8 | 5 | 2 | 39 | |
| 2025 | ARI | DSL | 5 | 1 | 2.21 | 8 | 8 | 0 | 0 | 0 | 0 | 0 | 40.2 | 157 | 24 | 11 | 10 | 0 | 11 | 0 | 5 | 3 | 0 | 38 | |
| 2025 | ARI | DSL | 0 | 1 | 3.72 | 4 | 4 | 0 | 0 | 0 | 0 | 0 | 19.1 | 73 | 13 | 8 | 8 | 1 | 5 | 0 | 2 | 1 | 2 | 26 | |
| 2025 | ARI | MiLB | 5 | 2 | 2.70 | 12 | 12 | 0 | 0 | 0 | 0 | 0 | 60.0 | 230 | 37 | 19 | 18 | 1 | 16 | 0 | 7 | 4 | 2 | 64 | |
| 2026 | Steamer | PROJ | 0 | 0 | 6.41 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |||
| 2026 | Steamer | ROS | 0 | 0 | 6.38 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 1 |
| Season | Team | Level | W W - Wins | L L - Losses | ERA ERA - Earned Run Average ((ER*9)/IP) | G G - Games Pitched | GS GS - Games Started | QS QS - Quality Starts; pitched at least 6 innings and gave up 3 or fewer earned runs | CG CG - Complete Games | ShO ShO - Shoutouts | SV SV - Saves | HLD HLD - Holds | BS BS - Blown Saves | IP IP - Innings Pitched | TBF TBF - Total Batters Faced | H H - Hits Allowed | R R - Runs Allowed | ER ER - Earned Runs | HR HR - Home Runs | BB BB - Walks | IBB IBB - Intentional | HBP HBP - Hit Batters | WP WP - Wild Pitches | BK BK - Balks | SO SO - Strikeouts |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | ARI | DSL | 3 | 2 | 4.18 | 9 | 2 | 0 | 0 | 2 | 1 | 0 | 23.2 | 106 | 13 | 12 | 11 | 0 | 17 | 0 | 5 | 4 | 0 | 25 | |
| 2024 | ARI | DSL | 0 | 1 | 3.75 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 12.0 | 49 | 10 | 5 | 5 | 0 | 5 | 0 | 3 | 1 | 2 | 14 | |
| 2024 | ARI | MiLB | 3 | 3 | 4.04 | 12 | 5 | 0 | 0 | 2 | 1 | 0 | 35.2 | 155 | 23 | 17 | 16 | 0 | 22 | 0 | 8 | 5 | 2 | 39 | |
| 2025 | ARI | DSL | 5 | 1 | 2.21 | 8 | 8 | 0 | 0 | 0 | 0 | 0 | 40.2 | 157 | 24 | 11 | 10 | 0 | 11 | 0 | 5 | 3 | 0 | 38 | |
| 2025 | ARI | DSL | 0 | 1 | 3.72 | 4 | 4 | 0 | 0 | 0 | 0 | 0 | 19.1 | 73 | 13 | 8 | 8 | 1 | 5 | 0 | 2 | 1 | 2 | 26 | |
| 2025 | ARI | MiLB | 5 | 2 | 2.70 | 12 | 12 | 0 | 0 | 0 | 0 | 0 | 60.0 | 230 | 37 | 19 | 18 | 1 | 16 | 0 | 7 | 4 | 2 | 64 | |
| 2026 | Steamer | PROJ | 0 | 0 | 6.41 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |||
| 2026 | Steamer | ROS | 0 | 0 | 6.38 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 1 |
Preseason ProjectionsIn-Season ProjectionsMinor LeaguesAverages
| Season | Team | Level | K/9 K/9 - Strikeouts per 9 Innings ((SO*9)/IP) | BB/9 BB/9 - Walks per 9 Innings ((BB*9)/IP) | K/BB K/BB - Strikeout to Walk Ratio (SO/BB) | HR/9 HR/9 - Home Runs per 9 Innings ((HR*9)/IP) | divider | K% K% - Strikeout Percentage (SO/TBF) | BB% BB% - Walk Percentage (BB/TBF) | K-BB% K-BB% - The difference between strikeout percentage and walk percentage | divider | AVG AVG - Batting Average Against | WHIP WHIP - Walks + Hits divided by Innings Pitched | BABIP BABIP - Batting Average on Balls in Play | LOB% LOB% - Left on Base Percentage | divider | ERA- ERA- - ERA adjusted for park and league where 100 is average and lower is better | FIP- FIP- - FIP adjusted for park and league where 100 is average and lower is better | divider | FIP FIP - Fielder Independent Pitching on an ERA scale |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | ARI | DSL | 9.51 | 6.46 | 1.47 | 0.00 | 23.6% | 16.0% | 7.5% | .155 | 1.27 | .220 | 65.7% | 79 | 92 | 4.65 | ||||
| 2024 | ARI | DSL | 10.50 | 3.75 | 2.80 | 0.00 | 28.6% | 10.2% | 18.4% | .244 | 1.25 | .370 | 72.2% | 79 | 77 | 3.64 | ||||
| 2024 | ARI | MiLB | 9.84 | 5.55 | 1.77 | 0.00 | 25.2% | 14.2% | 11.0% | .184 | 1.26 | .267 | 67.9% | 79 | 87 | 4.31 | ||||
| 2025 | ARI | DSL | 8.41 | 2.43 | 3.45 | 0.00 | 24.2% | 7.0% | 17.2% | .170 | 0.86 | .233 | 72.5% | 39 | 61 | 3.34 | ||||
| 2025 | ARI | DSL | 12.10 | 2.33 | 5.20 | 0.47 | 35.6% | 6.8% | 28.8% | .197 | 0.93 | .308 | 64.5% | 72 | 60 | 3.10 | ||||
| 2025 | ARI | MiLB | 9.60 | 2.40 | 4.00 | 0.15 | 27.8% | 7.0% | 20.9% | .179 | 0.88 | .254 | 70.0% | 49 | 60 | 3.27 | ||||
| 2026 | Steamer | PROJ | 4.65 | 6.65 | 0.70 | 1.48 | 10.7% | 15.3% | -4.6% | .287 | 1.90 | .297 | 68.4% | 6.61 | ||||||
| 2026 | Steamer | ROS | 4.80 | 6.81 | 0.70 | 1.45 | 11.0% | 15.7% | -4.6% | .285 | 1.90 | .296 | 68.6% | 6.60 |
| Season | Team | Level | K/9 K/9 - Strikeouts per 9 Innings ((SO*9)/IP) | BB/9 BB/9 - Walks per 9 Innings ((BB*9)/IP) | K/BB K/BB - Strikeout to Walk Ratio (SO/BB) | HR/9 HR/9 - Home Runs per 9 Innings ((HR*9)/IP) | divider | K% K% - Strikeout Percentage (SO/TBF) | BB% BB% - Walk Percentage (BB/TBF) | K-BB% K-BB% - The difference between strikeout percentage and walk percentage | divider | AVG AVG - Batting Average Against | WHIP WHIP - Walks + Hits divided by Innings Pitched | BABIP BABIP - Batting Average on Balls in Play | LOB% LOB% - Left on Base Percentage | divider | ERA- ERA- - ERA adjusted for park and league where 100 is average and lower is better | FIP- FIP- - FIP adjusted for park and league where 100 is average and lower is better | divider | FIP FIP - Fielder Independent Pitching on an ERA scale |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | ARI | DSL | 9.51 | 6.46 | 1.47 | 0.00 | 23.6% | 16.0% | 7.5% | .155 | 1.27 | .220 | 65.7% | 79 | 92 | 4.65 | ||||
| 2024 | ARI | DSL | 10.50 | 3.75 | 2.80 | 0.00 | 28.6% | 10.2% | 18.4% | .244 | 1.25 | .370 | 72.2% | 79 | 77 | 3.64 | ||||
| 2024 | ARI | MiLB | 9.84 | 5.55 | 1.77 | 0.00 | 25.2% | 14.2% | 11.0% | .184 | 1.26 | .267 | 67.9% | 79 | 87 | 4.31 | ||||
| 2025 | ARI | DSL | 8.41 | 2.43 | 3.45 | 0.00 | 24.2% | 7.0% | 17.2% | .170 | 0.86 | .233 | 72.5% | 39 | 61 | 3.34 | ||||
| 2025 | ARI | DSL | 12.10 | 2.33 | 5.20 | 0.47 | 35.6% | 6.8% | 28.8% | .197 | 0.93 | .308 | 64.5% | 72 | 60 | 3.10 | ||||
| 2025 | ARI | MiLB | 9.60 | 2.40 | 4.00 | 0.15 | 27.8% | 7.0% | 20.9% | .179 | 0.88 | .254 | 70.0% | 49 | 60 | 3.27 | ||||
| 2026 | Steamer | PROJ | 4.65 | 6.65 | 0.70 | 1.48 | 10.7% | 15.3% | -4.6% | .287 | 1.90 | .297 | 68.4% | 6.61 | ||||||
| 2026 | Steamer | ROS | 4.80 | 6.81 | 0.70 | 1.45 | 11.0% | 15.7% | -4.6% | .285 | 1.90 | .296 | 68.6% | 6.60 |
