Gabriel Quintana hit a leadoff homer in the bottom of the 10th to pace Double-A San Antonio to a 3-2 win over Midland.
Quintana, who now has 12 homers on the season, drove in two runs and scored a pair.
Left-hander Tim Berry, a 50th-round pick of Baltimore in 2009 out of San Marcos High, started for the Missions and allowed one run on one hit over 4 2/3 innings with eight strikeouts.
Berry underwent Tommy John surgery before he threw his first professional pitch, but climbed the ladder and was once considered one of Baltimore's top prospects.