Capps played in Major League Baseball (MLB) for the San Diego Padres, Seattle Mariners, and Miami Marlins from 2012 to 2017.

Before being promoted to the Tacoma Rainiers of the Triple–A Pacific Coast League Capps struck out 72 hitters in 50 innings and posted 19 saves, along with a 1.26 ERA.

[10] On March 8, 2016, in Gulf Breeze, Florida, Dr. James Andrews performed Tommy John surgery on Capps, ruling him out for the 2016 season.

[11] On July 29, 2016, the Marlins traded Capps, Josh Naylor, Jarred Cosart, and Luis Castillo to the San Diego Padres for Andrew Cashner, Colin Rea, Tayron Guerrero, and cash considerations.

[12] Capps began the 2017 season on the disabled list, to continue rehabbing from his previous Tommy John surgery.

[23] On January 12, 2021, Capps joined the New York Mets organization as a minor league pitching coach and coordinator.