Kai Peterson
Toronto Blue Jays (AA)P
Age: 23
Bats/Throws: L/L
6'0" / 190
DOB: 8/14/2002
(23 years, 8 months, 1 day)
P
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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 | TOR | A | 21 | 6 | 3 | 2 | 22 | 0 | 31.1 | 18.10 | 8.33 | 0.29 | .367 | 66.5% | 43.8% | 6.3% | 4.60 | 3.30 | 3.45 | ||||||
| 2024 | TOR | A+ | 21 | 0 | 1 | 2 | 18 | 0 | 18.1 | 13.75 | 6.87 | 0.00 | .282 | 63.3% | 48.7% | 0.0% | 4.42 | 3.58 | 4.43 | ||||||
| 2024 | TOR | MiLB | 21 | 6 | 4 | 4 | 40 | 0 | 49.2 | 16.49 | 7.79 | 0.18 | .330 | 65.4% | 46.0% | 3.4% | 4.53 | 3.40 | 3.81 | ||||||
| 2025 | TOR | A+ | 22 | 3 | 1 | 1 | 29 | 0 | 42.2 | 10.13 | 4.64 | 0.63 | .270 | 77.1% | 29.0% | 5.7% | 2.74 | 4.22 | 5.05 | ||||||
| 2025 | TOR | AA | 22 | 0 | 0 | 0 | 9 | 0 | 7.2 | 15.26 | 8.22 | 1.17 | .471 | 84.3% | 27.8% | 14.3% | 4.70 | 5.12 | 4.48 | ||||||
| 2025 | TOR | MiLB | 22 | 3 | 1 | 1 | 38 | 0 | 50.1 | 10.91 | 5.19 | 0.72 | .299 | 78.7% | 28.8% | 6.7% | 3.04 | 4.36 | 4.96 | ||||||
| 2026 | Steamer | PROJ | 23 | 0 | 0 | 0 | 1 | 0 | 1.0 | 8.48 | 5.09 | 1.24 | .288 | 72.9% | 37.9% | 4.61 | 4.93 | 5.01 | 0.0 | ||||||
| 2026 | OOPSY | PROJ | 23 | 0 | 0 | 0 | 1 | 0 | 1.3 | 8.68 | 5.48 | 1.38 | .279 | 71.4% | 4.90 | 5.20 | 0.0 | ||||||||
| 2026 | TOR | AA | 23 | 0 | 0 | 0 | 2 | 0 | 2.2 | 13.50 | 10.13 | 3.38 | .000 | 100.0% | 40.0% | 33.3% | 3.38 | 9.07 | 5.94 | ||||||
| 2026 | Steamer | ROS | 23 | 0 | 0 | 0 | 1 | 0 | 1.0 | 8.64 | 5.53 | 1.19 | .290 | 72.8% | 4.66 | 4.97 | 0.0 | ||||||||
| 2026 | OOPSY | ROS | 23 | 0 | 0 | 0 | 1 | 0 | 1.3 | 9.26 | 5.72 | 1.36 | .278 | 72.5% | 4.78 | 5.12 | 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 | TOR | A | 21 | 6 | 3 | 2 | 22 | 0 | 31.1 | 18.10 | 8.33 | 0.29 | .367 | 66.5% | 43.8% | 6.3% | 4.60 | 3.30 | 3.45 | ||||||
| 2024 | TOR | A+ | 21 | 0 | 1 | 2 | 18 | 0 | 18.1 | 13.75 | 6.87 | 0.00 | .282 | 63.3% | 48.7% | 0.0% | 4.42 | 3.58 | 4.43 | ||||||
| 2024 | TOR | MiLB | 21 | 6 | 4 | 4 | 40 | 0 | 49.2 | 16.49 | 7.79 | 0.18 | .330 | 65.4% | 46.0% | 3.4% | 4.53 | 3.40 | 3.81 | ||||||
| 2025 | TOR | A+ | 22 | 3 | 1 | 1 | 29 | 0 | 42.2 | 10.13 | 4.64 | 0.63 | .270 | 77.1% | 29.0% | 5.7% | 2.74 | 4.22 | 5.05 | ||||||
| 2025 | TOR | AA | 22 | 0 | 0 | 0 | 9 | 0 | 7.2 | 15.26 | 8.22 | 1.17 | .471 | 84.3% | 27.8% | 14.3% | 4.70 | 5.12 | 4.48 | ||||||
| 2025 | TOR | MiLB | 22 | 3 | 1 | 1 | 38 | 0 | 50.1 | 10.91 | 5.19 | 0.72 | .299 | 78.7% | 28.8% | 6.7% | 3.04 | 4.36 | 4.96 | ||||||
| 2026 | Steamer | PROJ | 23 | 0 | 0 | 0 | 1 | 0 | 1.0 | 8.48 | 5.09 | 1.24 | .288 | 72.9% | 37.9% | 4.61 | 4.93 | 5.01 | 0.0 | ||||||
| 2026 | OOPSY | PROJ | 23 | 0 | 0 | 0 | 1 | 0 | 1.3 | 8.68 | 5.48 | 1.38 | .279 | 71.4% | 4.90 | 5.20 | 0.0 | ||||||||
| 2026 | TOR | AA | 23 | 0 | 0 | 0 | 2 | 0 | 2.2 | 13.50 | 10.13 | 3.38 | .000 | 100.0% | 40.0% | 33.3% | 3.38 | 9.07 | 5.94 | ||||||
| 2026 | Steamer | ROS | 23 | 0 | 0 | 0 | 1 | 0 | 1.0 | 8.64 | 5.53 | 1.19 | .290 | 72.8% | 4.66 | 4.97 | 0.0 | ||||||||
| 2026 | OOPSY | ROS | 23 | 0 | 0 | 0 | 1 | 0 | 1.3 | 9.26 | 5.72 | 1.36 | .278 | 72.5% | 4.78 | 5.12 | 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 | TOR | A | 6 | 3 | 4.60 | 22 | 0 | 0 | 0 | 2 | 1 | 2 | 31.1 | 148 | 19 | 19 | 16 | 1 | 29 | 1 | 6 | 8 | 1 | 63 | |
| 2024 | TOR | A+ | 0 | 1 | 4.42 | 18 | 0 | 0 | 0 | 2 | 0 | 0 | 18.1 | 86 | 11 | 11 | 9 | 0 | 14 | 0 | 5 | 1 | 0 | 28 | |
| 2024 | TOR | MiLB | 6 | 4 | 4.53 | 40 | 0 | 0 | 0 | 4 | 1 | 2 | 49.2 | 234 | 30 | 30 | 25 | 1 | 43 | 1 | 11 | 9 | 1 | 91 | |
| 2025 | TOR | A+ | 3 | 1 | 2.74 | 29 | 0 | 0 | 0 | 1 | 1 | 2 | 42.2 | 181 | 30 | 17 | 13 | 3 | 22 | 0 | 8 | 3 | 1 | 48 | |
| 2025 | TOR | AA | 0 | 0 | 4.70 | 9 | 0 | 0 | 0 | 0 | 3 | 0 | 7.2 | 40 | 9 | 4 | 4 | 1 | 7 | 0 | 2 | 0 | 0 | 13 | |
| 2025 | TOR | MiLB | 3 | 1 | 3.04 | 38 | 0 | 0 | 0 | 1 | 4 | 2 | 50.1 | 221 | 39 | 21 | 17 | 4 | 29 | 0 | 10 | 3 | 1 | 61 | |
| 2026 | Steamer | PROJ | 0 | 0 | 4.61 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |||
| 2026 | OOPSY | PROJ | 0 | 0 | 4.90 | 1 | 0 | 0 | 0 | 0 | 1.3 | 6 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |||||
| 2026 | TOR | AA | 0 | 0 | 3.38 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2.2 | 12 | 1 | 1 | 1 | 1 | 3 | 0 | 0 | 0 | 0 | 4 | |
| 2026 | Steamer | ROS | 0 | 0 | 4.66 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | ||||
| 2026 | OOPSY | ROS | 0 | 0 | 4.78 | 1 | 0 | 0 | 0 | 0 | 1.3 | 6 | 1 | 1 | 1 | 0 | 1 | 0 | 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 | TOR | A | 6 | 3 | 4.60 | 22 | 0 | 0 | 0 | 2 | 1 | 2 | 31.1 | 148 | 19 | 19 | 16 | 1 | 29 | 1 | 6 | 8 | 1 | 63 | |
| 2024 | TOR | A+ | 0 | 1 | 4.42 | 18 | 0 | 0 | 0 | 2 | 0 | 0 | 18.1 | 86 | 11 | 11 | 9 | 0 | 14 | 0 | 5 | 1 | 0 | 28 | |
| 2024 | TOR | MiLB | 6 | 4 | 4.53 | 40 | 0 | 0 | 0 | 4 | 1 | 2 | 49.2 | 234 | 30 | 30 | 25 | 1 | 43 | 1 | 11 | 9 | 1 | 91 | |
| 2025 | TOR | A+ | 3 | 1 | 2.74 | 29 | 0 | 0 | 0 | 1 | 1 | 2 | 42.2 | 181 | 30 | 17 | 13 | 3 | 22 | 0 | 8 | 3 | 1 | 48 | |
| 2025 | TOR | AA | 0 | 0 | 4.70 | 9 | 0 | 0 | 0 | 0 | 3 | 0 | 7.2 | 40 | 9 | 4 | 4 | 1 | 7 | 0 | 2 | 0 | 0 | 13 | |
| 2025 | TOR | MiLB | 3 | 1 | 3.04 | 38 | 0 | 0 | 0 | 1 | 4 | 2 | 50.1 | 221 | 39 | 21 | 17 | 4 | 29 | 0 | 10 | 3 | 1 | 61 | |
| 2026 | Steamer | PROJ | 0 | 0 | 4.61 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |||
| 2026 | OOPSY | PROJ | 0 | 0 | 4.90 | 1 | 0 | 0 | 0 | 0 | 1.3 | 6 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |||||
| 2026 | TOR | AA | 0 | 0 | 3.38 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2.2 | 12 | 1 | 1 | 1 | 1 | 3 | 0 | 0 | 0 | 0 | 4 | |
| 2026 | Steamer | ROS | 0 | 0 | 4.66 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | ||||
| 2026 | OOPSY | ROS | 0 | 0 | 4.78 | 1 | 0 | 0 | 0 | 0 | 1.3 | 6 | 1 | 1 | 1 | 0 | 1 | 0 | 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 | TOR | A | 18.10 | 8.33 | 2.17 | 0.29 | 42.6% | 19.6% | 23.0% | .168 | 1.53 | .367 | 66.5% | 113 | 81 | 3.30 | ||||
| 2024 | TOR | A+ | 13.75 | 6.87 | 2.00 | 0.00 | 32.6% | 16.3% | 16.3% | .164 | 1.36 | .282 | 63.3% | 112 | 88 | 3.58 | ||||
| 2024 | TOR | MiLB | 16.49 | 7.79 | 2.12 | 0.18 | 38.9% | 18.4% | 20.5% | .167 | 1.47 | .330 | 65.4% | 113 | 84 | 3.40 | ||||
| 2025 | TOR | A+ | 10.13 | 4.64 | 2.18 | 0.63 | 26.5% | 12.2% | 14.4% | .199 | 1.22 | .270 | 77.1% | 64 | 95 | 4.22 | ||||
| 2025 | TOR | AA | 15.26 | 8.22 | 1.86 | 1.17 | 32.5% | 17.5% | 15.0% | .290 | 2.09 | .471 | 84.3% | 122 | 133 | 5.12 | ||||
| 2025 | TOR | MiLB | 10.91 | 5.19 | 2.10 | 0.72 | 27.6% | 13.1% | 14.5% | .214 | 1.35 | .299 | 78.7% | 73 | 101 | 4.36 | ||||
| 2026 | Steamer | PROJ | 8.48 | 5.09 | 1.66 | 1.24 | 21.0% | 12.6% | 8.4% | .243 | 1.51 | .288 | 72.9% | 4.93 | ||||||
| 2026 | OOPSY | PROJ | 8.68 | 5.48 | 1.59 | 1.38 | 21.1% | 13.3% | 7.8% | .239 | 1.54 | .279 | 71.4% | 5.20 | ||||||
| 2026 | TOR | AA | 13.50 | 10.13 | 1.33 | 3.38 | 33.3% | 25.0% | 8.3% | .111 | 1.50 | .000 | 100.0% | 71 | 191 | 9.07 | ||||
| 2026 | Steamer | ROS | 8.64 | 5.53 | 1.56 | 1.19 | 21.2% | 13.5% | 7.6% | .242 | 1.55 | .290 | 72.8% | 4.97 | ||||||
| 2026 | OOPSY | ROS | 9.26 | 5.72 | 1.62 | 1.36 | 22.3% | 13.8% | 8.5% | .233 | 1.55 | .278 | 72.5% | 5.12 |
| 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 | TOR | A | 18.10 | 8.33 | 2.17 | 0.29 | 42.6% | 19.6% | 23.0% | .168 | 1.53 | .367 | 66.5% | 113 | 81 | 3.30 | ||||
| 2024 | TOR | A+ | 13.75 | 6.87 | 2.00 | 0.00 | 32.6% | 16.3% | 16.3% | .164 | 1.36 | .282 | 63.3% | 112 | 88 | 3.58 | ||||
| 2024 | TOR | MiLB | 16.49 | 7.79 | 2.12 | 0.18 | 38.9% | 18.4% | 20.5% | .167 | 1.47 | .330 | 65.4% | 113 | 84 | 3.40 | ||||
| 2025 | TOR | A+ | 10.13 | 4.64 | 2.18 | 0.63 | 26.5% | 12.2% | 14.4% | .199 | 1.22 | .270 | 77.1% | 64 | 95 | 4.22 | ||||
| 2025 | TOR | AA | 15.26 | 8.22 | 1.86 | 1.17 | 32.5% | 17.5% | 15.0% | .290 | 2.09 | .471 | 84.3% | 122 | 133 | 5.12 | ||||
| 2025 | TOR | MiLB | 10.91 | 5.19 | 2.10 | 0.72 | 27.6% | 13.1% | 14.5% | .214 | 1.35 | .299 | 78.7% | 73 | 101 | 4.36 | ||||
| 2026 | Steamer | PROJ | 8.48 | 5.09 | 1.66 | 1.24 | 21.0% | 12.6% | 8.4% | .243 | 1.51 | .288 | 72.9% | 4.93 | ||||||
| 2026 | OOPSY | PROJ | 8.68 | 5.48 | 1.59 | 1.38 | 21.1% | 13.3% | 7.8% | .239 | 1.54 | .279 | 71.4% | 5.20 | ||||||
| 2026 | TOR | AA | 13.50 | 10.13 | 1.33 | 3.38 | 33.3% | 25.0% | 8.3% | .111 | 1.50 | .000 | 100.0% | 71 | 191 | 9.07 | ||||
| 2026 | Steamer | ROS | 8.64 | 5.53 | 1.56 | 1.19 | 21.2% | 13.5% | 7.6% | .242 | 1.55 | .290 | 72.8% | 4.97 | ||||||
| 2026 | OOPSY | ROS | 9.26 | 5.72 | 1.62 | 1.36 | 22.3% | 13.8% | 8.5% | .233 | 1.55 | .278 | 72.5% | 5.12 |
