Marcelo Mayer

Active

San Francisco Giants · 2B/3B/SS

Age 236' 3" · 188 lbsBats Left

#362 Preseason

FBaseball Overview

At 23, Mayer remains in development mode after a sluggish transition to MLB, posting a .220 average with minimal power (3 HR) and run production (22 RBI) through 205 at-bats in 2026. His speed upside (3 stolen bases) offers some intrigue, but the lack of power-hitting prowess and sub-.230 batting average limit his immediate fantasy appeal in standard leagues. The young shortstop-turned-second-baseman carries significant downside risk given his early struggles at the plate, though his youth and All-Star pedigree in the minors suggest room for growth and potential breakout potential in future seasons. Fantasy managers should view Mayer as a deep-league flier or bench stash rather than a core contributor in 2026.

MLB Hitting

Year	Team	G	PA	AB	AVG	HR	RBI	R	SB	K	OBP	SLG	OPS
2025	Boston Red Sox	44	136	127	.228	4	10	20	0	41	.272	.402	.674
2026	2 teams▼	76	245	220	.209	3	22	19	3	51	.275	.295	.570
Career	Totals	120	381	347	.216	7	32	39	3	92	.274	.334	.608

Source: MLB Stats API · Multi-team seasons show combined totals — click to expand

Minor League Hitting

Year	Team	G	PA	AB	AVG	HR	RBI	R	SB	K	OBP	SLG	OPS
2021	FCL Red Sox	26	107	91	.275	3	17	25	7	27	.377	.440	.817
2022	2 teams▼	91	424	350	.280	13	53	61	17	107	.399	.489	.888
2023	2 teams▼	78	354	314	.236	13	54	43	9	86	.306	.433	.739
2024	Portland Sea Dogs	77	335	300	.307	8	38	60	13	66	.370	.480	.850
2025	Worcester Red Sox	43	193	170	.271	9	43	31	2	38	.347	.471	.818
2026	Sacramento River Cats	4	19	17	.353	1	3	3	0	9	.421	.588	1.009
Career	Totals	319	1432	1242	.275	47	208	223	48	333	.361	.468	.829

Source: MLB Stats API · Multi-team seasons show combined totals — click to expand

Last Week / Last Month

Current season · MLB only

7 games

G	PA	AB	AVG	HR	RBI	R	SB	K	OBP	SLG	OPS
7	21	19	.053	0	0	0	0	9	.143	.053	.196

30 games

G	PA	AB	AVG	HR	RBI	R	SB	K	OBP	SLG	OPS
30	93	84	.202	1	12	8	0	22	.269	.286	.555

Game Log2026 MLB

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Advanced Stats2026 season · via Baseball Savant

Click for year to year changes

EV Avg86.1 mph

Max EV109.1 mph

Launch Angle8.9°

Barrel %6.4%

K %20.8%

Hard Hit %35.5%

Sprint Speed27.3 ft/s

Bat Speed74.6 mph

Whiff %27.5%

Chase %28.5%

xBA0.196

xSLG0.295

xwOBA0.257

GB%51.2%

FB%25.0%

What These Stats Mean

EV Avg — Average exit velocity — how hard this batter hits the ball. Elite hitters (90+ mph) make consistently hard contact, driving better batting averages and more power.

Max EV — Peak exit velocity on the batter's hardest-hit ball this season. Signals raw power potential even without a high HR total yet.

Launch Angle — Average vertical angle of the ball off the bat. The sweet spot for extra-base hits is roughly 10–30°; extreme ground ball or pop-up hitters sit outside this range.

Barrel % — Percentage of batted balls hit with the optimal exit velocity + launch angle combo. Barrels are the single best predictor of home runs and slugging percentage.

K % — Strikeout rate per plate appearance. High K% suppresses batting average and limits run-scoring opportunities — lower is better for fantasy.

Hard Hit % — Percentage of batted balls hit 95 mph or harder. A broader power indicator than barrels; high hard-hit% players rack up extra-base hits and RBI.

Sprint Speed — Peak sprint speed in feet per second. The best predictor of stolen base upside and ability to leg out infield hits.

Bat Speed — Average swing speed at the point of contact. Faster bat speed lets hitters wait longer on pitches and generates more raw power potential.

Whiff % — Percentage of swings that miss. High whiff rates signal strikeout vulnerability, dragging down batting average and overall production.

Chase % — How often the batter swings at pitches outside the strike zone. Low chase rates mean elite plate discipline — more walks, fewer strikeouts, more consistent at-bats.

xBA — Expected batting average based on contact quality, stripping out luck and defensive positioning. Better predictor of future performance than actual batting average.

xSLG — Expected slugging based on batted ball data. A high xSLG relative to actual SLG suggests power suppressed by bad luck that's likely to bounce back.

xwOBA — Expected weighted on-base average — the most comprehensive single expected metric. Combines contact quality, walks, and strikeouts to project overall offensive production.

GB% — Ground ball rate. High GB% hitters trade home run power for speed-dependent value — good for stolen base upside, but a drag on HR and SLG categories.

FB% — Fly ball rate. Elite power hitters combine high FB% with high exit velocity. High fly ball rate + soft contact = home run or nothing type.

Loading player data...

Year

Team

AVG

RBI

OBP

SLG

OPS

2025

Boston Red Sox

136

127

.228

.272

.402

.674

2026

2 teams▼

245

220

.209

.275

.295

.570

Career

Totals

120

381

347

.216

.274

.334

.608

Year

Team

AVG

RBI

OBP

SLG

OPS

2021

FCL Red Sox

107

.275

.377

.440

.817

2022

2 teams▼

424

350

.280

107

.399

.489

.888

2023

2 teams▼

354

314

.236

.306

.433

.739

2024

Portland Sea Dogs

335

300

.307

.370

.480

.850

2025

Worcester Red Sox

193

170

.271

.347

.471

.818

2026

Sacramento River Cats

.353

.421

.588

1.009

Career

Totals

319

1432

1242

.275

208

223

333

.361

.468

.829

AVG

RBI

OBP

SLG

OPS

.053

.143

.053

.196

AVG

RBI

OBP

SLG

OPS

.202

.269

.286

.555