The pair of relievers entered a Florida State League game with Dunedin, and had no setbacks.
McGowan came on in the sixth and pitched a scoreless frame while striking out a batter. Delabar followed in the seventh with his own clean inning, as both picked up a hold.
Delabar last pitched in the Majors on Aug. 2 and McGowan on July 29, but both are ready to resume their roles as the Blue Jays two right-handed setup men.
The Blue Jays will also call up a third catcher, but are waiting for news on A.J. Jimenez's most recent elbow injury before making a move.
"We don't know how bad it is. A nerve flared up on him," manger John Gibbons said. "He has a history of arm problems, so he's got to see how bad that is. Hopefully it's just a day or two and he can come up here and do his thing."
Jimenez hit .287 with four home runs and 38 RBIs in 67 games over three levels of the Blue Jays' farm system, ending up at Triple-A Buffalo this season.
If Jimenez is unable to join the Blue Jays it will likely be his Buffalo backup Mike Nickeas who would take his place.