Giants recall OF Justin Christian
Christian appeared in 22 games for the Giants earlier this season, hitting .158 with one RBI before being sent down to Fresno on Aug. 2.
Hacker made one start for San Francisco this season, giving up three runs and eight hits over six innings in the Giants' 5-3 loss to San Diego on April 27.
He walked two and struck out seven in his first big league start. The former reliever is 12-6 with a 3.95 ERA as a starter for Fresno.
Copyright 2012 by The Associated Press