What happened: Sonny Gray is officially a free agent after his mutual option was declined, triggering a $10 million buyout. The veteran right-hander spent the 2026 season with the Boston Red Sox, anchoring the rotation with a 2.72 ERA across 29 starts.

Why it matters: Gray hits the open market as a top-tier rotation option after tying for the major league lead with 18 wins during the 2026 campaign. His departure opens a significant vacancy at the front of Boston's starting staff heading into the winter.

What to watch: Gray is eligible to negotiate with all 30 clubs once the free-agent signing period officially opens. The Red Sox will evaluate whether to extend a qualifying offer or pursue alternative frontline pitching on the market.