The host Eagles tried desperately to crawl back in it with a 14-6 scoring advantage in the third quarter, but the Jays had what it takes to pull away in the final frame with a 15-11 scoring margin.
Neal Bunt led the Eagles in scoring with 15 points, while freshman Dylan Spieler tallied seven points and seven rebounds for MMC.
Trevor Bouma paced Gehlen with 17 points, and Taylor Wurth added none points.
"The game became very physical in the second quarter and we struggled to put the ball in the basket," said MMC coach Pat Bird. "We went for an 8-minute stretch the last four minutes of the first half and the first four minutes of the second half without scoring. That translates into a 15-12 game becoming a 37-12 game.
"We went man-to-man in the second half and I thought our boys did a fine job with that, holding them to six points in the third quarter.
"We opened the season with two tough teams and althigh we lost both games, I can see many positives. In particular, the underclassmen are improving each week, and I can see them becoming a bigger part of our rotation as the season progresses."
The MMC teams religiously play at Hull Trinity Christian Thursday, and host Storm Lake St. Mary's Friday.