The moves came before Corbin took the mound against Colorado on Saturday night in his first start since undergoing Tommy John surgery in March 2014.
Corbin was 14-6 with a 3.41 ERA for Arizona in 2013, his first full season in the majors. He was 1-1 with a 4.76 ERA in four rehab starts with Class A Visalia and Double-A Mobile.
The 22-year-old Hernandez, a Rule 5 draft selection last year, had been sidelined all season with a broken bone in his left hand.
The Diamondbacks also transferred catcher Tuffy Gosewisch (torn ACL) to the 60-day DL.