Zajac, New Jersey's first-round pick (No. 20) in the 2004 NHL Draft, unexpectedly made the Devils in 2006 and wound up centering for Zach Parise and Jamie Langenbrunner on what became known as the "ZZ Pops'' line. He has established himself as a consistent playmaker and reached double figures in goals in eight of his first 10 seasons.
Zajac joined the Devils after helping the University of North Dakota reach the NCAA Frozen Four twice in as many seasons. He was named to the NCAA Championship All-Tournament Team, the NCAA East All-Tournament Team and WCHA All-Rookie Team as a freshman in 2005. After North Dakota lost to Boston College in the 2006 Frozen Four, he left college and signed with New Jersey on April 13, 2006. He made his NHL debut against the Carolina Hurricanes on Oct. 6, 2006, and scored his first NHL goal the next night against the Dallas Stars.