The Yankees recalled De Los Santos from Triple-A Scranton/Wilkes-Barre on Friday.
De Los Santos will provide manager Aaron Boone with a fresh bullpen arm ahead of Friday's doubleheader versus the Orioles. The 28-year-old reliever has managed a 1.35 ERA in 15 appearances out of the Yankees' bullpen this season, though that's come with an undesirable 15:8 K:BB.