Mariners trade Luis Castillo to White Sox

The Seattle Mariners traded veteran right-handed starting pitcher Luis Castillo to the Chicago White Sox on Saturday, August 1, in a deal that reshapes the roster of both clubs ahead of the August 3 trade deadline. In exchange for Castillo, the Mariners received right-handed reliever Seranthony Domínguez, outfielder Nolan Jones, and catching prospect Boston Smith. The White Sox will assume the entirety of Castillo’s remaining contract.

Castillo, a three-time All-Star, was a central figure for Seattle after being acquired at the 2022 trade deadline, helping the team reach the postseason that year for the first time since 2001. In 126 appearances with the Mariners, he compiled a record of 43-40 with a 3.69 ERA. This season, however, the 33-year-old has struggled, posting a 3-9 record and a 5.06 ERA across 20 appearances and nearly 100 innings pitched. Mariners president of baseball operations Jerry Dipoto said Castillo’s arrival and performance in 2022 set the tone for a fantastic run with the organization and wished him continued success.

The trade signals divergent paths for the two American League clubs. The White Sox, who lead the AL Central by 2.5 games with a 58-52 record,...