The Mariners’ April, by the numbers

TL;DR

The Seattle Mariners had a mixed performance in April 2026, with a run differential of +7 and notable player statistics. Randy Arozarena led the team in fWAR while Cole Young topped rWAR.

Key points

Seattle Mariners had a run differential of +7 in April 2026
Randy Arozarena led the team in fWAR with 1.1
Cole Young was the rWAR leader with 1.9

Seattle MarinersHouston Astros

SEATTLE, WA - APRIL 11: Members of the Seattle Mariners celebrate after winning the game between the Houston Astros and the Seattle Mariners at T-Mobile Park on Saturday, April 11, 2026 in Seattle, Washington. (Photo by Eric Hiller/MLB Photos via Getty Images) | MLB Photos via Getty Images **Rick Rizzs Happy Totals:** 16 **Dan Wilson Tough Ones Tonight:** 16 **Last Four March/Aprils:** 11-10, 12-16, 17-13, 18-12 **Run Differential:** +7 **Las Four March/Aprils:** +16, +1, +12, +23 **wRC+:** 105 (7th) **Rotation ERA-/FIP-:** 98/97 (15th)/(12th) **Bullpen ERA-/FIP-:** 84/86 (7th)/(6th) **OAA:** -15 (30th) **BsR:** -0.9 (23rd) **Mariners fWAR leader:** Randy Arozarena, 1.1 **Mariners rWAR leader:** Cole Young, 1.9 **Beef Boy Bombs:** 7 **Josh Naylor SB:** 4 for 6 **Julio K%:** 22.1% (lowest March/April yet) **Julio EV:** 88.2 (lowest March/April yet) **J.P. BB%:** 18.8% **Luke Raley xwOBA:** .385 **Dominic Canzone EV:** 95.5 **Brendan Donovan wOBA-xwOBA:** +.084 ** Changeup RV/100:** 7.330 (19th highest among 2,051 pitches) **Andrés Muñoz SwStr%:** 19.1% ** Haricuts:** 1 (worst of his career) ** swords:** 11 (5th) ** Fastball Velo:** 94.8 **Luis Castillo Fastball Velo, March/April 2025:** 94.8 ** K/BB:** 3.09 **George Kirby K/BB, 2022-2025:** 6.68 **George Kirby xERA:** 2.85 ** K%-BB%:** 19.7% **Emerson Hancock K%-BB%, 2023-2025:** 8.0% **Kade Anderson K%-BB%:** 38.2% **Ryan Sloan K%-BB%:** 14.3% **Lazaro Montes K%:** 31.2% **Luke Stevenson wRC+:** 175 **Colt Emerson MLB G:** 0 **ABS Challenges:** 41 for 70 **Your Favorite Stats Not Listed Here:** In the comments **ABS:** Cole Young, +1.64 WPA **ABS Discourse:** Luis Castillo, -0.95 WPA

Q&A

What was the Seattle Mariners' run differential in April 2026?

The Seattle Mariners had a run differential of +7 in April 2026.

Who were the Seattle Mariners' fWAR and rWAR leaders in April 2026?

Randy Arozarena was the fWAR leader with 1.1, while Cole Young led in rWAR with 1.9.

How did the Seattle Mariners perform in their last four March/Aprils?

In their last four March/Aprils, the Mariners recorded records of 11-10, 12-16, 17-13, and 18-12.