Mota, 37, signed a Minor League contract on Feb. 2 this year before making the Opening Day roster. He proceeded to make 56 appearances, posting a 1-3 record with one save and a 4.33 ERA.
Mota, who recorded a 1.27 ERA in his first 23 games, made San Francisco's postseason roster in each round. He pitched twice in the World Series, amassing 2 1/3 scoreless innings.
Mota has the inside track to claim a spot in a bullpen that could remain unchanged from this season. He'll try to rejoin a relief corps that is likely to include left-handers Jeremy Affeldt, Javier Lopez and Dan Runzler, as well as righties Ramon Ramirez, Sergio Romo and Brian Wilson.
Chris Haft is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.