Hernandez, 36, is owed $3.2 million this season. He hit .217/.247/.353 with five homers in 52 games for Colorado last year while battling hand and hamstring problems. The Rockies opted to carry Yorvit Torrealba as Wilin Rosario's backup.
Harang, 34, is owed $7 million this year with a $7 million option for 2014. He went 10-10 with a 3.61 ERA in 31 starts for the Dodgers last year, though he was pushed out of the rotation this season due to the recent additions of Josh Beckett, Zack Greinke and Hyun-Jin Ryu.
Heyman says the Rockies are not planning to keep Harang and will flip him elsewhere. There is no shortage of teams in need of starting pitching, with clubs like the Mets, Padres and Astros all in need of arms. Harang was in the bullpen with the Dodgers and had yet to pitch this year.