McMahon is the only volleyball player to earn NJCAA All-American honors in consecutive years. During her playing career, the Lady Pioneers were 68-9, won the first Region III Championship since 1977, and finished tied for 5th at the NJCAA National Championships.
During her freshman season, McMahon helped the Lady Pioneers to 32-3 record and a Region III Runner-up finish. She recorded 212 digs, 177 kills, and 45 service aces in 66 games en route to be named 2nd team All-American, Region III Player of the Year, 1st team All-Region, and 1st team All-WNYAC.
In 2007, McMahon and the Lady Pioneers won the Region III Championship, finished tied for 5th at the NJCAA National Championships, and accumulated a 36-6 overall record. McMahon recorded 467 digs, 435 kills, and 76 service aces. She was named 1st team All-American, Region III Player of the Year, 1st team All-Region, and 1st team All-WNYAC. For her solid season, she was named the Alfred State Senior Athlete of the Year. Â
McMahon went on to play volleyball at Edinboro University and Buffalo State. She is still very active in the local volleyball community.