Molina was recalled from Triple-A Sacramento ahead of Monday's game against the Reds, Shayna Rubin of the San Francisco Chronicle reports.
Molina was acquired by the Giants in early August and has fared well at Triple-A, where he's posted a 2.45 ERA and 0.91 WHIP with 12 strikeouts over 11.0 innings (four appearances). Matt Wilkinson was optioned to Triple-A on Monday, and with San Francisco scheduled to play a doubleheader Saturday, Molina could be the favorite start one of Saturday's matchups.