Complex sentence: After finishing his junior hockey career, Trouba joined the University of Michigan for the 2012--13 season, where he played in 37 games for the Wolverines in his first season, scoring 12 goals and 17 assists.
Split into simpler sentences: After finishing his junior hockey career, Trouba joined the University of Michigan for the 2012--2013 season. Trouba played in 37 games for the Wolverines, scoring 12 goals and adding 17 assists.