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| Player Report for #19 Ronald Peterson | | Wednesday, December 31st, 2025 |  | | Name: | Ronald Peterson | Contract: | None | | Nickname: | | Salary: | | | Birthday: | 11-08-2006 | Signed Through: | | | Age: | 19 | Years of Major League Service: | None, None | | Born in: | Sacramento (California) | Major League Service Days this Year: | None | | Nationality: | American | | | | Height: | 6' 1" | Years on 40-Man Roster: | None, None | | Weight: | 205 lbs | Years of Pro Service: | None | | | | Arbitration Eligibility: | Not yet eligible | | Position: | MR | Minor League Option Years: | 3 option years left | | Bats: | Switch | | | | Throws: | Right | Contract Extension | - | | Status: | Completely Rested | Drafted | - | | Morale: | Normal | Local Popularity (National) | Unknown (Unknown) |
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| Pitching Ratings (SISA) | | Pitching | Stuff | Movement | Control | Velocity | | | Overall | 1 | 1 | 1 | 91-93 Mph | | | Versus LHP | 1 | 1 | 1 | | | | Versus RHP | 1 | 1 | 1 | | | | Talent | 8 | 4 | 7 | | |
| Pitching Ratings | | | Pitches: | Fastball, Changeup, Slider, Cutter | | Endurance: | 7 | | | | | Groundball Pct.: | 61 | | | | | Holding Runners: | 18 | | | |
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| Batting Ratings (SISA) | | Batting | Contact | Gap | Power | Discipline/Eye | Avoid K's | | | Overall | 1 | 3 | 1 | 1 | 1 | | | Versus LHP | 1 | 2 | 1 | 1 | 1 | | | Versus RHP | 1 | 3 | 1 | 1 | 1 | | | Talent | 3 | 9 | 1 | 3 | 8 | |
| Running & Bunting Ratings | | | Fielding Ratings | | Running Speed: | 5 | | Pitcher 14 | | Stealing Ability: | 1 | | | | Baserunning Instincts: | 1 | | | | Sacrifice Bunt: | 17 | | | | Bunt for Hit: | 1 | | | | Hitter Type: | Normal | | | | | | | | | | | | | | | | | |
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| Game Log, Last 10 Games | | Date | Opponent | Result | Start | IP | H | R | ER | BB | K | Dec | | | | | | | | | 06-14-2025 | WIN | Loss, 1-8 | | 2.1 | 4 | 1 | 1 | 0 | 2 | | | | | | | | | | 06-12-2025 | @ WIN | Loss, 4-18 | | 3.1 | 4 | 2 | 1 | 0 | 2 | | | | | | | | | | 06-02-2025 | @ WIN | Loss, 4-13 | | 0.1 | 0 | 0 | 0 | 0 | 0 | | | | | | | | | | 06-01-2025 | @ WIN | Loss, 1-14 | | 0.1 | 4 | 4 | 4 | 1 | 1 | | | | | | | | | | 05-31-2025 | WIN | Loss, 5-7 | | 2.2 | 1 | 0 | 0 | 3 | 1 | | | | | | | | | | 05-25-2025 | @ MON | Loss, 6-9 | | 1.1 | 2 | 0 | 0 | 2 | 0 | | | | | | | | | | 05-21-2025 | FAI | Loss, 2-12 | | 1.2 | 2 | 3 | 3 | 1 | 0 | | | | | | | | | | 04-30-2025 | @ SHO | Loss, 3-12 | | 2.1 | 3 | 2 | 2 | 1 | 1 | | | | | | | | | | 04-29-2025 | @ SHO | Loss, 6-9 | | 3.1 | 3 | 1 | 1 | 2 | 1 | | | | | | | | | | 04-24-2025 | @ UNI | Loss, 2-14 | | 2.2 | 5 | 5 | 5 | 2 | 0 | | | | | | | | |
| MLB Rookie League 2025 Pitching Stats | | Pitching | G | GS | W | L | SV | ERA | IP | HA | R | ER | HR | BB | K | CG | CG% | SHO | QS | QS% | | Overall | 13 | 0 | 1 | 0 | 0 | 7.25 | 22.1 | 29 | 20 | 18 | 1 | 17 | 5 | 0 | 0.0 | 0 | 0 | 0.0 | | Pitching | SVO | BS | SV% | RA | GF | R/9 | H/9 | K/9 | BB/9 | ERC | WHIP | VORP | BABIP | | | | | | | Overall | 1 | 1 | 0.0 | 13 | 6 | 18.54 | 11.69 | 2.01 | 6.85 | 6.67 | 2.06 | -3.1 | .326 | | | | | | | Pitching | AB | H | 2B | 3B | HR | R | BB | K | SF | SH | HP | AVG | OBP | SLG | OPS | | | | | vs. LHB | 36 | 10 | 4 | 0 | 1 | 12 | 6 | 2 | 0 | 0 | 0 | .278 | .381 | .472 | .853 | | | | | vs. RHB | 56 | 19 | 2 | 0 | 0 | 8 | 11 | 3 | 1 | 0 | 0 | .339 | .441 | .375 | .816 | | | |
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| MLB Rookie League 2025 Pitching Splits | | Split | G | GS | W | L | SV | ERA | IP | HA | R | ER | HR | BB | K | | | April | 8 | 0 | 1 | 0 | 0 | 6.19 | 16.0 | 20 | 13 | 11 | 0 | 10 | 3 | | | May | 3 | 0 | 0 | 0 | 0 | 4.77 | 5.2 | 5 | 3 | 3 | 1 | 6 | 1 | | | June | 2 | 0 | 0 | 0 | 0 | 54.05 | 0.2 | 4 | 4 | 4 | 0 | 1 | 1 | | | Playoffs | 2 | 0 | 0 | 0 | 0 | 3.18 | 5.2 | 8 | 3 | 2 | 0 | 0 | 4 | | | Career | 13 | 0 | 1 | 0 | 0 | 7.25 | 22.1 | 29 | 20 | 18 | 1 | 17 | 5 | | | Home | 3 | 0 | 0 | 0 | 0 | 4.26 | 6.1 | 5 | 3 | 3 | 1 | 4 | 2 | | | Road | 10 | 0 | 1 | 0 | 0 | 8.44 | 16.0 | 24 | 17 | 15 | 0 | 13 | 3 | | | Grass | 13 | 0 | 1 | 0 | 0 | 7.25 | 22.1 | 29 | 20 | 18 | 1 | 17 | 5 | | | Day | 4 | 0 | 0 | 0 | 0 | 9.39 | 7.2 | 11 | 8 | 8 | 1 | 5 | 1 | | | Night | 9 | 0 | 1 | 0 | 0 | 6.14 | 14.2 | 18 | 12 | 10 | 0 | 12 | 4 | |
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| Career Pitching Stats | | Year/Team/League | Age | G | GS | W | L | SV | ERA | IP | HA | R | ER | HR | BB | K | CG | SHO | WHIP | BABIP | VORP |
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| Career Minor League Pitching Stats | | Year/Team/League | Age | G | GS | W | L | SV | ERA | IP | HA | R | ER | HR | BB | K | CG | SHO | WHIP | BABIP | VORP | | 2025 Rochelle - R | 18 | 13 | 0 | 1 | 0 | 0 | 7.25 | 22.1 | 29 | 20 | 18 | 1 | 17 | 5 | 0 | 0 | 2.06 | .326 | -3.1 | | Total MLBR | | 13 | 0 | 1 | 0 | 0 | 7.25 | 22.1 | 29 | 20 | 18 | 1 | 17 | 5 | 0 | 0 | 2.06 | .326 | -3.1 |
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| Career Postseason Pitching Stats | | Year/Team/League | Age | G | GS | W | L | SV | ERA | IP | HA | R | ER | HR | BB | K | CG | SHO | WHIP | BABIP | VORP | | 2025 Rochelle - MLBR | 18 | 2 | 0 | 0 | 0 | 0 | 3.18 | 5.2 | 8 | 3 | 2 | 0 | 0 | 4 | 0 | 0 | 1.41 | .364 | 0.0 | | Total MLBR | | 2 | 0 | 0 | 0 | 0 | 3.18 | 5.2 | 8 | 3 | 2 | 0 | 0 | 4 | 0 | 0 | 1.41 | .364 | 0.0 |
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| Career Fielding Stats | | Year/Team/League | POS | G | GS | PO | A | DP | TC | E | PCT | INN | RANGE | PB | RSTA | RTO | RTO% | | 2025 Rochelle - R | P | 13 | 0 | 1 | 3 | 0 | 4 | 0 | 1.000 | 22.1 | 1.61 | | | | | | | | | | | | | | | | | | | | |
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| Player History | | 01-01-2025 | SISA scouting updated ratings (potential): Stuff: 1 (6); Movement: 1 (1); Control: 4 (11). | | 04-01-2025 | Signed a 1-year minor league contract with the Seattle Mariners organization. | | 07-08-2025 | Released by the Seattle organization. |
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