Mariners Moose Tracks, 5/8/25: Luis F. Castillo, Andrés Muñoz, and Yordan Álvarez

Mariners off-day links.

Hello friends! We’ve got to get through another Mariners off-day before the Great Toronto Invasion kicks off tomorrow. Here’s what you need to know as you get your day started.

In Mariners news...

• Athletics Nation recapped the M’s 6-5 comeback win against the A’s from the other side’s perspective.
• The Orioles claimed right-hander Luis F. Castillo off waivers from the Mariners.
• Alex Chamberlain at Fangraphs tried to explain exactly what makes Andrés Muñoz’s fastball uniquely difficult to hit (Warning! Gory mathematical details ahead!)
• Here’s your daily dose of feel-good.

Around the league...

• The Pirates fan who fell onto the field last week continues to make positive progress in his recovery.
• The Astros believe that slugger Yordan Álvarez could be ready to return from the injured list when first eligible.
• The oft-injured Kris Bryant is headed for a minimally invasive surgical procedure on his lower back today.
• Checking in on a former Mariner...

• Eno Sarris at The Athletic cherry-picked ten stats that should be worrying for teams in the early going. ($)