#1松井裕樹
San Diego Padres · P · Bats L, Throws L
Yuki Matsui is spending the early part of the 2026 season rehabbing, with no MLB appearances through April 27. Reports indicate he has resumed game appearances at Triple-A El Paso as he works toward a May return. The Padres' reliable left-handed reliever — who made 60+ appearances in each of his first two MLB seasons — is expected to return to the active roster once cleared.
Yuki Matsui joined the Padres in 2024 after recording 200+ career saves with the Rakuten Eagles in NPB. He hit the ground running in MLB, logging 60+ appearances in each of his first two seasons as a versatile reliever. His effectiveness against left-handed hitters makes him a valuable bullpen weapon, and in 2026, Matsui is targeting a permanent setup role for San Diego.
5 starts · 12 total strikeouts
| Date | Opp | IP | K | HR | BB | Dec |
|---|---|---|---|---|---|---|
| 5/21 | vsLAD | 1.1 | 2 | - | 2 | - |
| 5/18 | @SEA | 2.0 | 2 | - | 2 | - |
| 5/15 |
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| Year | Team | APP | GS | W | L | ERA | IP | K | WHIP | SV |
|---|---|---|---|---|---|---|---|---|---|---|
| 2024BEST | - | 64 | 0 | 4 | 2 | 3.73 | 62.2 | 69 | 1.16 | 0 |
| 2025 | - | 61 | 0 | 3 | 1 | 3.98 | 63.1 | 61 | 1.36 | 1 |
| 2026 | - | 5 | 0 | 0 | 0 | 0.00 | 10.0 | 12 | 1.10 | 0 |
| Career | - | 130 | 0 | 7 | 3 | 3.57 | 136.0 | 142 | 1.25 | 1 |
Matsui has no MLB appearances through April 27, 2026 — he is rehabbing and working back through Triple-A El Paso. Reports indicate game appearances at the minor league level have resumed and a May return to the active roster is expected. His career stats and previous season logs are available in the stats section on this page.
Matsui has zero MLB appearances through April 27, 2026 — he opened the season on the IL and is rehabbing at Triple-A El Paso. Reports indicate minor league game appearances have resumed, with a May return to the active roster expected. In his first two MLB seasons (2024-2025), he logged 60+ appearances each year as a left-handed specialist; that role is waiting for him once cleared.
Matsui recorded 200+ career saves as the Tohoku Rakuten Eagles closer before joining the Padres in 2024. In his first two MLB seasons he made 60+ appearances each year as a left-handed reliever, primarily a left-on-left specialist with setup-inning usage. With Yu Darvish also rehabbing in 2026 (Tommy John, mid-2027 target), Matsui's May return matters to the Padres' bullpen depth — he projects directly back into high-leverage left-handed match-up situations once cleared.
Matsui is a left-handed relief pitcher (bullpen) for the San Diego Padres. He is most valuable as a left-handed specialist — his effectiveness against left-handed hitters makes him a high-leverage weapon in the late innings. The Padres also use him in setup situations and multi-out appearances when match-ups align.
Yuki Matsui was born on October 21, 1995, making him 30 years old during the 2026 MLB season. He joined the Padres in 2024 after a decorated NPB career with the Tohoku Rakuten Eagles, where he accumulated 200+ career saves as their closer.
Matsui's greatest MLB asset is his effectiveness against left-handed batters. His tight breaking ball and deceptive arm angle create natural movement away from left-handed swings, generating weak contact and strikeouts. This left-on-left dominance is the primary reason the Padres have kept him on their roster across two seasons and why his return from injury is important to their bullpen construction.
As of April 27, 2026, Matsui is progressing through a rehab assignment at Triple-A El Paso and a May return to the active Padres roster is expected. His injury status and return timeline are updated on this page as new information becomes available.
Matsui is currently rehabbing and has no MLB appearances through April 27, 2026. His latest rehab outings at Triple-A El Paso, return timeline, and Padres roster updates are surfaced in the stats box at the top of this page and on the dedicated "Today" page. A May return to the active Padres roster is expected.
Yuki Matsui plays for the San Diego Padres as a left-handed relief pitcher. He signed a 5-year deal with San Diego in 2024 and is in year 3 of that contract in 2026. After rehabbing through April, he is expected to return as a left-handed specialist / setup option in the Padres bullpen — a role he established with 60+ appearances in each of his first two MLB seasons.
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Data: MLB Stats API · Auto-updated hourly
【2026 as of 4/27】Rehab program progressing — game appearances resumed at Triple-A El Paso Chihuahuas with a May return timeline. No MLB appearances yet in 2026, but the Padres expect him back in the bullpen role he established over two strong seasons
| @MIL |
| 2.0 |
| 3 |
| - |
| 1 |
| - |
| 5/13 | @MIL | 2.0 | 3 | - | 0 | - |
| 5/9 | vsSTL | 2.2 | 2 | - | 1 | - |
In-depth metrics aggregated from every at-bat and pitch. Collapsed by default.
Data as of: 2026-05-17
Green = improvement, red = decline. "—" means no data in the same month last year.
Pitching
| May | |
|---|---|
| ERA | -4.22 |
| K | +5 |
| WHIP | -0.40 |
Comprehensive 2026 season analysis generated by Claude AI from stats data.
Through two appearances spanning 4.2 innings, Yuki Matsui has posted a 0.00 ERA with a 1.07 WHIP, 9.64 K/9, and 1.93 BB/9. The sample is too small to draw firm conclusions, but the early ratios sit favorably against league context: his WHIP is better than the MLB average of 1.19 and approaches the P75 mark of 1.02, while his K/9 clears the league average of 8.51 and trends toward P75 (9.77). His BB/9 sits well below the league average of 2.88, closer to the P75 threshold of 2.28. Overall, the early markers are encouraging but require a larger workload before any meaningful evaluation.
The most notable early signal is improved walk control. Matsui's 1.93 BB/9 represents a meaningful step forward relative to typical reliever benchmarks and would mark a clear refinement if sustained. His strikeout rate of 9.64 K/9 is also closer to his 2024 form (9.91) than to his 2025 dip (8.67), suggesting his swing-and-miss stuff may be reverting toward his stronger baseline. Combined with a sub-1.10 WHIP, the early picture suggests he is locating effectively and avoiding the free-pass issues that can compound for high-leverage relievers. These are positive directional indicators rather than established trends.
The clearest gap is simply sample size: 4.2 innings cannot validate any of the early ratios, and ERA of 0.00 is unsustainable by definition. His K/9 of 9.64, while solid, still trails the P75 mark of 9.77 and sits well below the P90 threshold of 10.73 that characterizes elite high-leverage arms. WHIP at 1.07 is good but not in the P90 tier (0.95). Career ERAs of 3.73 and 3.98 in 2024 and 2025 also indicate his established baseline is closer to league average than to leverage-defining dominance, so regression toward those marks remains the realistic expectation.
The realistic outlook is gradual normalization toward his career baseline rather than continuation of the current ERA. If the improved walk rate and recovered strikeout rate hold across a larger sample, an ERA in the low-to-mid 3.00s with a WHIP near 1.10 would represent a meaningful step forward from 2025 and align him closer to MLB P75 territory. The key indicators to monitor are sustained BB/9 below 2.50, K/9 holding above 9.00, and whether his usage pattern stabilizes into a defined bullpen role. Two outings are not a trend, but the underlying ratios offer a reasonable foundation for cautious optimism.
AI-generated content (Claude)
Older games on the left, most recent on the right. Color shows how they played.
Best: 6IP+ / ≤1ER · Good: 5IP+ / ≤2ER · OK: 4IP+ / ≤3ER · 4ER · ≥5ER (blowup)
Percentile rank against all MLB players (P25/P50/P75/P90). Triangle = player, line = MLB avg.
ERA vs right-handed and left-handed batters this season. Spot weaknesses by batter type.
| Split | ERA | IP | K | BAA |
|---|---|---|---|---|
| vs RHB | -.-- | 4.1 | 5 | .167 |
| vs LHB | -.-- | 5.1 | 7 | .167 |
Situational splits for the current season. See strengths and weaknesses by scenario.
| Split | OAVG | OOPS | HR | K | BB |
|---|---|---|---|---|---|
| vs RHB | .125 | .398 | 0 | 3 | 2 |
| vs LHB | .214 | .500 | 0 | 5 | 0 |
| Split |
|---|
Career-long performance trends for every key stat. How does this year compare to history?
| Season | G | IP | ERA | WHIP | K/9 | BB/9 | K |
|---|---|---|---|---|---|---|---|
| 2024 | 64 | 62.2 | 3.73 | 1.16 |
| OAVG |
|---|
| OOPS |
|---|
| HR |
|---|
| K |
|---|
| BB |
|---|
| Home | .333 | .697 | 0 | 2 | 1 |
| Away | .077 | .297 | 0 | 6 | 1 |
3.88 |
69 |
| 2025 | 61 | 63.1 | 3.98 | 1.36 | 8.67 | 4.69 | 61 |
| 2026Now | 3 | 6.2 | 0.00 | 0.90 | 10.80 | 2.70 | 8 |