Doolittle has been diagnosed with a strained triceps but is expected to be ready for Opening Day, Susan Slusser of the San Francisco Chronicle reports.

EDGE Analysis

Sidelined since last Sunday, Doolittle's absence has been explained, though he's slated to throw off flat ground this Sunday, before progressing to minor league outings in the near future. The closer stated those games will be used to "hone his offspeed stuff," which he found difficulty doing before the injury. In three Cactus League appearances, the Athletics' closer has allowed two runs on five hits and one walk while striking out four in three innings.