🇺🇸 Mason Donaldson

PITCHER P VAN ◆ Age 28 (Nov 30) Born St. Louis, US Bats R · Throws R Salary ƒ1.1 crore Est. value ƒ1.1 crore AL
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PAVG
0.000
OPS+
0
wRC+
-44
HR
0
RBI
0
bWAR
-0.02
W-L
0-1
wERA
13.67
wERA+
78
GSc Idx
99
xRA
14.66
K
3
pWAR
-0.03
Standard Batting
GPAAB RH 2B3BHR RBIBBSO HBPSBCSFO PAVG OBPSLGOPS
1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0.000 0.000 0.000 0.000
Advanced Batting
BAVG Δ2C ISO BABIP K%BB%HR% BB/K wOBA OPS+ wOBA+ wRC+ 2C 2C-H 2C-Conv% 2C-RBI 2C-RBI% 2C-RBI/2C FO% MhAB% SB%
0.000 +0.000 0.000 0.000 0.0% 0.0% 0.0% 0.00 0.000 0 0 -44 0 0 0.0% 0 0.0% 0.00 0.0% 0.0% —
Clutch · RISP
RISP PA RISP-AVG RISP-OBP RISP-SLG RISP-OPS RISP-RBI RISP-Conv
0 0.000 0.000 0.000 0.000 0 0.00
Small Ball · Bunting
SH Bunts Bunt H Sqz Sqz RBI
0 0 0 0 0
Runner Advancement
1B% 1B 2B% 2B 3B% 3B All% RAD
— 0/0 — 0/0 — 0/0 — 0
Value (Batting)
oVORP oWAR Def DRS dWAR WPA LI WAR
-0.4 -0.02 0.290 -0.0 -0.00 +0.00 0.44 -0.02
Standard Pitching
GGS WL BFOuts HRER BBSOHR HBPUER SBCSFO P
5 1 0 1 33 19 17 13 12 3 3 1 2 1 1 0 0 109
Result-Tier (wERA / xRA / Decay)
wERA xRA Decay
13.67 14.66 —
Workload
GSc avg OS% OS+ AOR WS%
49.2 14% 52 3.8 0%
Per-Batter Rates & Opponent Profile
K% BB% HR% oAVG BABIP O/P P/BF FO%
9.1% 9.1% 3.0% 0.607 0.667 0.174 3.30 0.0%
Walk-Back & MLB-Readable Rates

Walk-Back Stop% measures how often this pitcher strands the post-HR rule-placed runner on 3B. The bonus run, when it scores, is unearned (Manfred-runner precedent) and is excluded from ERA but charged to runs allowed (and thus to wERA).

WB-F WB-R Stop% ERA WHIP K/9 BB/9 HR/9
1 1 0% 17.05 3.16 4.3 4.3 1.4
Relief & Finisher
IR IR-Sc IR-Stop% gmLI Late ER/BF LateK% TO QF LRA
4 3 25% 1.06 — — 0 0 10.00
Value (Pitching)
GSc+ GSc Idx wERA+ WPA LI VORP WAR
99 99 78 +0.09 0.98 -0.6 -0.03
Repertoire
Cutter 44 Slither Knuck 62 Drop Knuck 47 Palmball 44
20-80 scout grades. Primary pitch comes first; usage weight (% of typed pitches in neutral counts) drives ordering. Release angle, count, and platoon further bias which pitch fires each PA — see o27/config.py:PITCH_CATALOG.
Arsenal — in-game usage
FB% BR% OFF% 1B 2B 3B HR
35% 0% 72% 10 5 0 1
FB/BR/OFF are the pitcher's per-game pitch-mix averaged across appearances. 1B/2B/3B/HR are the actual hit shape allowed — driving the per-pitcher xRA v3 split.
Standard Fielding
Pos PO A E TC FldPct
P 0 0 0 0 —
Defensive Profile (rated)
Defense (overall) 32 Replacement Position-aware blend of general defense, arm, and position-specific glove
General defense 32 Replacement Glove / surehandedness — applied at any position
Arm 53 Above Avg Throwing strength — matters most at C / OF / SS
Infield (1B/2B/3B/SS) 50 Above Avg Position-group sub-rating
Outfield (LF/CF/RF) 50 Above Avg Position-group sub-rating
Catcher 50 Above Avg Position-group sub-rating
Defensive Value
Pos Def rating DRS dWAR
P 0.290 -0.0 -0.00

Plays are attributed to a fielder by position-weighted probability per BIP type (grounders cluster at SS/2B; flies at CF; etc.). Errors get charged to the responsible position. Assists and double plays aren't yet tracked separately — only PO and E.

Batting Splits all rate stats are league-baseline-relativized to the season; counting stats are raw within-split totals
Stat OverallHomeAwayLast 30 days
G 1 — 1 1
PA 1 — 1 1
AB 1 — 1 1
H 0 — 0 0
2B 0 — 0 0
3B 0 — 0 0
HR 0 — 0 0
RBI 0 — 0 0
R 0 — 0 0
BB 0 — 0 0
SO 0 — 0 0
SB 0 — 0 0
PAVG 0.000 — 0.000 0.000
OBP 0.000 — 0.000 0.000
SLG 0.000 — 0.000 0.000
OPS 0.000 — 0.000 0.000
OPS+ 0 — 0 0
wOBA 0.000 — 0.000 0.000
wRC+ -44 — -44 -44
BAVG 0.000 — 0.000 0.000
2C 0 — 0 0
WAR -0.02 — -0.02 -0.02
Pitching Splits arc-bucketed metrics (wERA / Decay) recompute per split using only that subset's arc counts
Stat OverallHomeAwayLast 30 days
G 5 2 3 5
GS 1 0 1 1
W 0 0 0 0
L 1 1 1 1
BF 33 10 23 33
Outs 19 5 14 19
K 3 1 2 3
BB 3 0 3 3
HR 1 0 1 1
FO 0 0 0 0
wERA 13.67 11.76 13.66 13.67
xRA 14.66 23.85 12.64 15.59
Decay — — — —
GSc avg 49.2 49.4 49.1 49.2
GSc+ 98 99 98 98
GSc Idx 98 99 98 98
wERA+ 78 90 78 78
OS+ 51 34 63 51
K% 9.1% 10.0% 8.7% 9.1%
BB% 9.1% 0.0% 13.0% 9.1%
WAR -0.03 0.01 -0.02 -0.03

Splits available: Home (player's team was home), Away (player's team was away), Last 30 days (rolling window from the league's most recent played date). All rate stats are relativized against full-season league baselines, not split-specific baselines.

Handedness Splits contact events only — K and BB not included
BIP H 2B 3B HR RBI BA SLG ISO
vs LHP no contact events yet
vs RHP 1 0 0 0 0 0 0.000 0.000 0.000
BIP H 2B 3B HR R BA SLG
vs LHB 11 8 2 0 1 9 0.727 1.182
vs RHB 14 7 3 0 0 3 0.500 0.714
Overall
Player overall ◆ 44
Hitting
Hitting (overall) 44 Below Avg Mean of contact, power, eye, and at-bat skill
Power 50 Above Avg Bias contact toward hard / boost HR weight
Contact 50 Above Avg Lower whiff rate; more fouls / in-play
Eye 50 Above Avg Discipline — more balls taken, fewer called Ks
Speed 51 Above Avg Base-running and stolen-base ability
Pitching
Pitching (overall) 44 Below Avg Weighted blend of stuff, command, movement, and stamina
Stuff (pitcher_skill) 33 Replacement Whiffs / swinging strikes
Command 70 Excellent Lower P(ball) — Maddux archetype
Movement 32 Replacement Bias contact toward weak / ground-out
Stamina 58 Good Within-game fatigue threshold; workhorse moat
Defense
Defense (overall) 32 Replacement Position-aware blend of general defense, arm, and position-specific glove
General defense 32 Replacement Range / glove
Arm 53 Above Avg
Infield 50 Above Avg
Outfield 50 Above Avg
Catcher 50 Above Avg
Bio & Tactics
PositionP
BatsRL / R / S
ThrowsRL / R
Age28
Work ethic 51 Season-long boost on every attribute. Re-rolls each off-season until age 30.
2C aggressiveness0.19Probability of choosing 2C when eligible
Contact-quality threshold0.37Second-Chance eligibility on medium contact

All ratings are on the 20–80 scout scale: 50 = league average, 80 = top of the league, 81–95 = elite-plus (.01% transcendent talents). Independent rolls per attribute, drawn from a 9-tier talent ladder.

Batting — last 1 games
DateOpp PAABH 2B3BHR RRBI BBSO HBPSBCSFO 2C ROE PO E
2026-04-21 @ SDP 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Box
Pitching — last 5 appearances
DateOpp GSc OutsBF HRER BBSOHR FO P
2026-04-28 vs CIN 43 3 5 4 1 0 0 0 0 0 15 Box
2026-04-25 @ PIT 28 8 11 4 4 4 2 2 1 0 40 Box
2026-04-21 @ SDP 41 5 8 3 2 2 0 0 0 0 19 Box
2026-04-17 vs BAL 32 2 5 4 3 3 0 1 0 0 21 Box
2026-04-11 @ POR 34 1 4 2 3 3 1 0 0 0 14 Box
Crossover (XO) Stats

O27 rate stats translated to MLB-readable values via mean-and-spread z-anchoring (formula: xo = MLB_mean + ((value − O27_mean) / O27_sd) · MLB_sd). The map preserves rank order exactly — XO leaderboards are the same player order as native — and preserves spread, so an elite O27 player shows up as an elite MLB-equivalent number rather than bunched at the league anchor. Read these the way you would read MLB stats; if a pitcher's XO ERA is 3.10, that's the MLB-equivalent of a 3.10 ERA.

Pitching Native (O27) XO (MLB-readable)
ERA 17.05 5.11
WHIP 3.16 1.42
K/9 4.3 5.3
BB/9 4.3 3.1
HR/9 1.4 1.1
oAVG 0.607 0.275
oOBP 0.667 0.349
oSLG 0.714 0.440
oOPS 1.381 0.789
Batting Native (O27) XO (MLB-readable)
AVG 0.000 0.177
OBP 0.000 0.209
SLG 0.000 0.281
OPS 0.000 0.499
wOBA 0.000 0.227
BABIP 0.000 0.203
Roster history Signings, transfers, injuries, trades — every roster move recorded for Mason Donaldson.
Date Season Event Team Detail
2026-04-05 1 waiver_claim VAN R5 claim — Mason Donaldson (P, ovr 45); replaces Buff Rinaldi (ovr 40)
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