Reference layer
Current snapshot
| Age | 23 |
| Height | 6' 3" |
| Weight | 188 lb |
| Debut | 2025-05-24 |
Player profile / Boston Red Sox
Marcelo Mayer
2B · Bats/Throws L/R · 6' 3", 188 lb · Age 23
Club Boston Red Sox
Position 2B
Roster Injured 10-Day
Status IL-10
Traditional line
Season by season
| PA | R | H | HR | SB | AVG | OBP | SLG | OPS | |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 136 | 20 | 29 | 4 | 0 | .228 | .272 | .402 | .674 |
| 2026 | 228 | 19 | 45 | 3 | 3 | .220 | .282 | .312 | .594 |
| 2 Seasons | 364 | 39 | 74 | 7 | 3 | .223 | .278 | .346 | .624 |
At a glance
Season percentile report
The headline weighs outcome stats (xwOBA, barrels); each bar averages its full strip group below. 100 = best in MLB.
23
Offense
percentile
percentile
Rolling projection
Preseason / current pace / Bayesian update
Rolling bands shrink current-season signal toward the preseason prior until the sample earns more weight.
| xwOBA preseason | 0.274 |
| xwOBA current pace | 0.259 |
| xwOBA rolling p50 | 0.266 |
| Observed weight | 53% |
xwOBA
0.226
0.245
0.266
0.287
0.306
wOBA
0.267
0.285
0.305
0.324
0.342
ISO
0.089
0.107
0.126
0.146
0.164
K%
17.6%
19.6%
21.7%
23.9%
25.8%
Live percentile strip
Current traits vs projection tick
100th = best in MLB.
Hitting · percentile strip
Barrel%4.8%
47
-17 vs proj
Exit velocity86.4
29
Hard-hit%36.7%
40
-36 vs proj
xBA0.256
5
xSLG0.378
8
xwOBA0.259
10
-35 vs proj
BB%7.7%
38
Bat speed72.7
85
K%19.0%
70
+38 vs proj
Defense · percentile strip
Arm Strength87.7 · 2B
61
Outs Above Avg2.0 · 2B
77
Range Runs-0.3 · 2B
45
Baserunning · percentile strip
Sprint Speed27.4 · 2B
51
SB Success Rate100.0% · 2B
Small sample
Mithrandir+
Plate skills: swing decisions and pitch-type resistance
Our research metrics for how this hitter controls the strike zone and handles each pitch family.
Avoids Bad ChasesST 63.5% · rebadged research
39
Avoids Bad TakesHPT 23.3% · rebadged research
68
Correct Decisions67.3% · rebadged research
61
Resists Breaking - horizontalwOBA 0.284 · borderline
59
Resists Breaking - verticalwOBA 0.272 · insufficient sample
75
Resists ChangeupwOBA 0.248 · validated thin sample
97
Resists Cutters + splitterswOBA 0.304 · insufficient sample
98
Resists FastballwOBA 0.346 · validated
34
Resists SinkerwOBA 0.372 · validated
20
SEAGER+ Plate Discipline101
48
Rolling form chart
xwOBA snapshot line
Live snapshot series; true 50/100 PA windows require PA-level logs
Spray profile
Field-coordinate spray profile
145 Statcast batted-ball coordinates from the pitch-event feed (2026). Direction profile remains as the v1 context layer when coordinate density is limited.
Zone profile
Aggregate zone heatmap
Aggregate zone metrics from seasonal Statcast leaderboards.
Live layer
Delta / regression
| xwOBA Δ | -0.045 |
| wOBA Δ | +0.001 |
negative regression
Regression watch
Running hot. Expect some cooling.
Mayer’s wOBA sits at 0.305, but the quality of contact underneath says it should be 0.259 — a gap of 0.046, -1.5 standard deviations from the MLB norm over 248 PA. The results have outrun the underlying process; as the sample grows, expect the numbers to drift back toward the deserved level.
Comp Engine · 2026 profile shape
Closest profiles
| Player | Similarity | Agrees on | Open |
|---|---|---|---|
| Chapman, Matt SF · R | 0.66 | Hard-hit rateBarrel rate | Player · Projection |
| Rengifo, Luis MIL · L | 0.62 | Oppo ratePull rate | Player · Projection |
| Herrera, Iván STL · R | 0.62 | Oppo ratePull rate | Player · Projection |
| Ortiz, Joey MIL · R | 0.62 | Ground-ball rateChase rate | Player · Projection |
Profile-shape similarity, not results: six weighted feature groups standardized within this season's qualified hitters.
Mithrandir coverage
Module shelf
| Module | Cards | Latest | Signal |
|---|---|---|---|
| No Mithrandir card history is available for this player yet. | |||
Projection links / recent games
Available detail
| Hitter Projections 20260.303 xwOBA | 8 HR | Projection |
| 2026-05-20 @ KC0 HR | 0 RBI / 2 Ch | 0 E | 1-3 | BB |
| 2026-04-20 vs DET0 HR | 0 RBI / 5 Ch | 0 E | 1-3 | R |
| 2026-04-17 vs DET0 HR | 0 RBI / 5 Ch | 0 E | 0-3 | BB, K |
| 2026-04-15 @ MIN0 HR | 0 RBI / 3 Ch | 0 E | 1-5 |
| 2026-04-13 @ MIN0 HR | 0 RBI / 4 Ch | 0 E | 0-3 | BB |