Prior to turning professional, Lacroix had featured in the Premier Development League for the Ocean City Nor’easters, for whom he made 20 appearances over two seasons and recorded three goals and four assists as the side claimed back-to-back Mid Atlantic Division titles in 2012 and 2013, and the Eastern Conference Championship in 2013.

A former U.S. U18 international, Lacroix also attended the University of Pennsylvania, where he went on to become one of the Quakers most successful players. He became the first player ever to be named both the Ivy League’s Rookie of the Year (2011) and an Ivy League Player of the Year (2013). He also graduated with the third-most appearances in Penn history, amassing a total of 68 games. Lacroix scored 25 goals and recorded 15 assists during his collegiate career.