In 444 career AHL games with the Albany Devils, Toronto Marlies, San Antonio Rampage and Tucson, Sislo has 271 points (129 goals, 142 assists). He's added 11 points (four goals, seven assists) in 27 career Calder Cup Playoff Games. Sislo represented Albany in the 2015-16 All Star Game and was named to the 2015-16 AHL Second All-Star Team after posting a career-high 53 points (27 goals, 26 assists).
Sislo made his NHL debut with the New Jersey Devils in 2013-14 and appeared in a career-high 18 NHL games with New Jersey in 2015-16. In 42 career NHL games, he recorded five points (three goals, two assists).
Prior to his professional career, Sislo played four seasons at the University of New Hampshire, serving as captain during his senior year in 2010-11. Before attending college, he played two seasons with the Green Bay Gamblers of the United States Hockey League.