Gray, 36, has a 3.58 ERA over a 13-year career with the Athletics, Yankees, Reds, Twins and Cardinals. He joins a Red Sox rotation that is led by ace Garrett Crochet but also features a handful of unproven candidates after right-hander Brayan Bello . Gray is the latest Red Sox pitcher to publicly say that he didn't enjoy playing for the Yankees.

The question now is whether the Red Sox will move an outfielder, which seems less like an "if" and more like a "when."

The Boston Red Sox appear to be moving into win-now move after shedding the largest contract on their books.

"When I was there (from mid-2017 through 2018), it just didn't really work for who I am," Gray said.