Blue Mountain starter John Paul Barber (4-6) took the loss, giving up eight runs on nine hits in 4.1 innings.
Mike Mandarino (7-2) allowed two runs on eight hits for the Bulldogs in his seventh complete game of the year in the opener. The righthander walked two and struck out five and has pitched at least seven innings in five of his last six outings.
BMC starter Blake Jolly (5-6) took the loss, allowing seven runs on 10 hits in six innings. He walked two, hit two batters and struck out one.
In the second McGee led off with a double and Sydnor walked before a run-scoring double from Wheeler. Richie Seaton then hit a three-run homer to right, his first of the season, for a 5-0 lead.
In the fifth Mandarino and Ferrell both singled with one out before McGee belted a three-run homer to right for his fourth home run of the year and an 8-0 advantage.
Cumberland plays at Campbellsville University on Tuesday at 5 p.m. and travels to rival Trevecca Nazarene for a three-game series next weekend.