Seam-Shifted: Andrés Muñoz is Back

Here's how the Mariners' ace reliever has done it the past 12 innings.

Andrés Muñoz has been a terrific reliever for the Seattle Mariners over the last four-plus seasons. But for a good portion of the first half of 2026, the right-hander just wasn’t himself. The velocity was fine. The slider movement was fine. His control was not, and it appeared at times as if hitters were sitting slider until obvious fastball counts. The results were hurting the team.

Since his June 14 outing at Washington, however, Muñoz has been dominant again.

How’s he doing it? What’s different?

Let’s dive in.