As a youth, Criscuolo played in the 2005 Quebec International Pee-Wee Hockey Tournament with the Philadelphia Flyersminor ice hockey team. Raised in Southampton Township, New Jersey, Criscuolo played high school hockey for two seasons at Choate Rosemary Hall in Connecticut and at St. Joseph's Preparatory School in Philadelphia for three seasons. Criscuolo played in the United States Hockey League with the Sioux City Musketeers before committing and playing collegiate hockey with Harvard University in the ECAC. Criscuolo despite his frame, continued to develop his offensive talent, playing the final two years of his tenure with the Crimson on the top scoring line alongside, Jimmy Vesey and Alexander Kerfoot. Undrafted, Criscuolo began his professional career at the conclusion of his senior year in the 2015–16 season. He signed a one-year American Hockey League deal for the following 2016–17 season, with the Grand Rapids Griffins on March 29, 2016, and joined the club on an amateur try-out in the closing stretches of the regular season. In his first full professional season, Criscuolo played in all 76 regular season games with the Griffins and contributed 17 goals and 41 points. He posted 9 points in 19 post-season contests to help the Griffins claim their second Calder Cup in franchise history. On July 1, 2017, Criscuolo as a free agent agreed to his first NHL deal, signing a two-year entry-level contract with the Buffalo Sabres. He was re-assigned by the Sabres at the completion of training camp to the Rochester Americans of the AHL to begin the 2017–18 season. He added 11 points in 14 games before he was recalled from the Americans to the Sabres on November 16, 2017. He made his debut with the Sabres against the Detroit Red Wings, the NHL affiliate of the Grand Rapids Griffins, in a 3-1 defeat on November 17, 2017. On July 1, 2019, Criscuolo left the Sabres as a free agent to sign a one-year, two-way contract with hometown team, the Philadelphia Flyers. In the following 2019–20 season, Criscuolo was assigned to AHL affiliate, the Lehigh Valley Phantoms. He collected 8 goals and 24 points in 40 games before he was dealt at the NHL trade deadline by the Flyers along with a 2020 fourth-round draft pick to the Anaheim Ducks in exchange for Derek Grant on February 24, 2020.
