The Aces scored a run in the top of the 12th to take a 4-3 lead.
The Missions’ Mauricio Dubon delivered an RBI single to score Troy Stokes Jr. with the tieing run in the bottom of the 12th.
Orf lofted a fly ball to left field to bring home Jake Hager from third with the winning run.
Dubon finished the game with three hits including a double. David Freitas, who is batting .363, had a hit and two RBIs.
Missions reliever Alex Wilson (3-0) pitched the top of the 12th inning and got the win.
