Jesse Crain performs agility drills Tuesday

Due to the improvement in his strained right calf, Astros pitcher Jesse Crain took part in agility drills Tuesday, MLB.com reports.

While the improvement in his calf in encouraging, Crain's biggest focus is getting his arm rounded into form after undergoing biceps tendinitis surgery in October.

"The calf's getting a lot better," Crain said Tuesday. "I should be out and hopefully running within the next week. The good thing is if I was on the mound throwing and getting ready for the season and this happened, it would be a setback. As far as where I am with my throwing program, it didn't affect any of that. That's a good thing and it's still a process, day-by-day thing and building my arm strength back up. Hopefully every day it's getting stronger, which it is."

Crain is one of the leading candidates for saves in the Houston bullpen if he can get and stay healthy.