NCAA tournament appearance, and their first championship, and Gostisbehere was named the tournament's Most Outstanding Player for his championship performance. Professional career Philadelphia Flyers 2014–16 Following his NCAA championship run, Gostisbehere signed a three-year, entry-level contract with the Flyers on April 15, 2014, and was assigned to the Adirondack Phantoms, the team's American Hockey League (AHL) affiliate. Gostisbehere joined the team for their final two games of the 2013–14 season, a 3–2 overtime loss to the Bridgeport Sound Tigers on April 19, and a 2–1 loss to the Hershey Bears on April 20. Gostisbehere began the 2014–15 season with the Phantoms, but was recalled to the Flyers as a replacement for injured defensemen Braydon Coburn and Andrew MacDonald. Flyers general manager Ron Hextall intended for Gostisbehere’s call-up to be temporary as he searched for a veteran free agent to replace the injured skaters. Gostisbehere made his NHL debut on October 25, 2014, pairing with Luke Schenn in a 4–2 victory over the Detroit Red Wings. He was moved back to the Phantoms on November 1, to make room on the 23-player active roster for the newly-healthy Vincent Lecavalier. On November 7, in his second game back in the AHL, Gostisbehere took a check from Kevin Raine of the Manchester Monarchs and felt a “pop” in his knee, later diagnosed as an anterior cruciate ligament injury. He did not play again that year, registering only five AHL and two NHL games in his first professional hockey season. That summer, Gostisbehere worked with Flyers athletic trainer Jim McCrossin, who focused on rehabilitating the skater’s entire body rather than focusing on the injured knee. He impressed at training camp, scoring three goals in three preseason games, but an uneven defensive performance led head coach Dave Hakstol to send Gostisbehere to the Phantoms for the beginning of the 2015–16 season. There, he recorded 10 points in 14 games before receiving another NHL call-up on November 14, 2015. He scored his first NHL point that same day, assisting in Wayne Simmonds’ game-tying goal in an ultimate 3–2 overtime win against the Carolina Hurricanes. His first goal came three days later, less than four minutes into a 3–2 shootout victory over the Los Angeles Kings. His second and third NHL goals both came in overtime games, making Gostisbehere the first rookie in Flyers history to score multiple overtime goals in the same season. On February 13,