"I feel a little better," Callaspo said in Spanish. "It's a little tight, but better."
Angels shortstop Erick Aybar, currently doing some aqua-therapy in Arizona, has already been lost to the disabled list because of a left heel contusion, with Andrew Romine and Brendan Harris basically platooning at shortstop while he's out.
Callaspo's ailment has given Luis Jimenez, the sixth-ranked Angels' prospect, a chance to get some Major League time. He figures to get at least three more starts, including Monday's series opener at Target Field.
"We're going to hopefully be able to get him through this series to see how much he progresses, get through the off-day [on Thursday] and make a determination of how his calf is doing," Angels manager Mike Scioscia said of Callaspo.
Alden Gonzalez is a reporter for MLB.com. Read his blog, Gonzo and "The Show", and follow him on Twitter @Alden_Gonzalez. This story was not subject to the approval of Major League Baseball or its clubs.