Slater, 24, missed 52 games with a strained right groin that he sustained July 7. At the time, Slater was batting .290 in 29 games. He resumed playing for the Giants on Sept. 6 after a whirlwind rehabilitation, but played just five games before being diagnosed with a right groin strain.
Overall, Slater has compiled a slash line of .282/.339/.402 with three home runs and 16 RBIs in 34 games. He had planned to play winter ball in the first half of the Dominican league's season.
Chris Haft has covered the Giants since 2005, and for MLB.com since 2007. Follow him on Twitter at @sfgiantsbeat and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.