The Seattle Mariners have traded right-hander Luis Castillo to the Chicago White Sox in exchange for right-hander Seranthony Domínguez, outfielder Nolan Jones, and catching prospect Boston Smith, along with cash considerations.
The struggling Mariners, who are four games below .500 and trail the Houston Astros by three games in the AL West, elected to part ways with one of their longest tenured players ahead of Monday's trade deadline.
Castillo, 33, is under contract through the 2027 season with a vesting option for 2028. He is 3-9 with 86 strikeouts and a 5.06 ERA across 99 2/3 innings.
The Mariners have a surplus of starting pitching options, including right-hander Bryce Miller, former first-round pick Emerson Hancock, George Kirby, and former All-Stars Logan Gilbert and Bryan Woo. Manager Dan Wilson had previously paired Castillo and Miller in a "piggyback" to ensure Seattle's six starting pitchers were all able to regularly appear in games.
Domínguez, 31, is 4-3 with a 4.10 ERA in 42 games this season. Jones, 28, did not appear in a game for Chicago, instead splitting his time between Triple-A Charlotte and Triple-A Columbus, the top affiliate for the Cleveland Guardians.
Smith, 23, is hitting .291 with 22 home runs and 58 RBIs across stints at three minor league levels. The Washington Nationals selected Smith in the sixth round of the 2025 MLB draft, and traded him to Chicago in March for utility man Curtis Mead.
The trade marks a significant move for the White Sox, who lead the AL Central by 2 1/2 games with a 58-52 record. They acquired a proven starter in Castillo, who will look to help their playoff push down the stretch.
The Mariners, meanwhile, are looking to rebuild their roster and will likely use the surplus pitching to bolster their farm system. They still have a deep pool of talent, but this trade marks a significant change in their pitching staff.
Source: Yahoo Sports