The Nittany Lions blew the game open in the third period.
Penn State get its first win of the season after starting 0-7.
UCLA closed the game on a 34-15 run.
The loss to Mercyhurst brought an end to the Penn State undefeated conference season.
The Nittany Lions allowed seven unanswered goals in a 12-10 loss to Richmond.
The Nittany Lions secured their fourth win in conference play on the back of a shutout by Arsenii Sergeev.