ARLINGTON, Texas (AP) — Alberto Callaspo was activated by the Oakland Athletics on Sunday, the first day the infielder was eligible to come off the 15-day disabled list.

To make room for Callaspo on the active roster, Oakland optioned first baseman Nate Freiman to Triple-A Sacramento.

Callaspo had been on the DL since July 12 because of a strained right hamstring. He has started more than a dozen games each at first, second and third this season.

The 31-year-old switch-hitter was not in the starting lineup against rookie right-hander Miles Mikolas. Eric Sogard, a left-handed batter, made his 53rd start at second base.

Another Athletics switch-hitter, center fielder Coco Crisp, did not start because his neck was bothering him, according to manager Bob Melvin. Craig Gentry was in center field.

Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.