Mariñez, 23, was recalled from Charlotte on July 13. He made his White Sox debut that night at Kansas City, throwing 1.2 scoreless IP in relief as the Sox posted a 9-8 victory in 14 innings. He was one of eight rookie pitchers used by Chicago in the game.
Mariñez is 2-2 with a 3.14 ERA (15 ER/43.0 IP) and 47 strikeouts in 26 relief appearances with Charlotte this season. The 6-foot-1, 200-pounder has limited opponents to a .182 (28-154) average, third-lowest among International League relievers, and has thrown 13.0 consecutive scoreless IP over his last six outings.
The White Sox will make a corresponding roster move prior to tomorrow night’s game at Boston.