The Red Sox selected Paez's contract from Triple-A Worcester, and he'll start Tuesday's game against the Mariners.
A Rule 5 Draft pick by the White Sox over the winter, Paez was returned to the Red Sox in early April after making three appearances for Chicago. The right-hander spent most of the campaign at Double-A Portland, where he posted a 4.41 ERA, 1.02 WHIP and 56:5 K:BB across 49 innings. He made his last three appearances for Worcester and was dominant while scattering seven hits and posting an 18:2 K:BB across 12.1 frames. Paez will likely be in store for just one start while the Red Sox build in extra rest for Sonny Gray ahead of his next turn through the rotation.