Tampa Bay Rays vs Seattle Mariners

Tampa Bay Rays at Seattle Mariners (2026-08-08). Griffin Jax vs George Kirby at T-Mobile Park.

Starters — Jax brings a 3.63 ERA and 1.21 WHIP across 91.2 innings, with strong bat-missing ability at 9.82 K/9. His 2.95 BB/9 is manageable, but the 1.37 HR/9 is a pressure point if contact gets elevated. Over his last three starts, he has allowed just 3 earned runs in 16.2 innings with 23 strikeouts and 4 walks, working 5.0, 5.2, and 6.0 innings. The recent trend is down, which supports the sharp run-prevention stretch. Kirby has a 3.76 ERA and 1.28 WHIP in 127 innings, pairing elite control at 1.84 BB/9 with a modest 7.8 K/9 and 1.06 HR/9. His last three starts were uneven but encouraging overall: 7.0 scoreless innings, then 4.0 innings with 7 earned runs, then 6.0 scoreless innings. The trend is up, and his profile still starts with limiting free passes.

Teams — Tampa Bay has the stronger offensive baseline with a .732 OPS, .258 average, and 512 runs scored. The Rays also back that up on the mound with a 3.71 team ERA and 1.15 WHIP, and they enter in solid form at 7-3 over the last 10. Seattle’s offense has been lighter by comparison, posting a .684 OPS, .229 average, and 459 runs. The Mariners’ pitching staff remains competitive at a 3.81 ERA and 1.20 WHIP, but recent team form is less convincing at 4-6 in the last 10. From a matchup standpoint, Tampa Bay shows the more complete statistical profile, while Seattle leans more on run prevention and Kirby’s command.