Polin began his collegiate career for the Western Michigan Broncos during the 2019–20 season, where he recorded seven goals and two assists in 31 games. During the 2020–21 season in his sophomore year, he recorded seven goals and seven assists in 23 games, in a season that was shortened due to the COVID-19 pandemic. During the 2021–22 season in his junior year, he recorded 16 goals and ten assists in 39 games.[2]
On September 15, 2022, he was named captain for the 2022–23 season.[3] On December 29, 2022, during the championship game at the Great Lakes Invitational (GLI), Polin recorded his fifth hat trick of the season to help the Broncos win the GLI, and was subsequently named the tournament MVP.[4] He became the first player in GLI history to score six goals in a single tournament, surpassing the previous record of five held by six different players.[5] His five hat tricks ranked second all-time in Western Michigan program history, one short of the record of six set by Ross Fitzpatrick in 1982.[6] During his senior year he had career highs in points (47), goals (30), assists (17), shots (152), power-play goals (6), game-winning goals (4), shorthanded goals (2) and plus-minus (+26). His 30 goals tied for the NCAA lead, with Adam Fantilli, and set a National Collegiate Hockey Conference (NCHC) single-season record, surpassing the previous record of 29 goals set by Josh Archibald in 2014.[7] He also led the NCAA in hat tricks and set an NCHC record with five. Following an outstanding season, he was named NCHC Player of the Year and NCHC Forward of the Year and an AHCAWest Second Team All-American. He became the first Broncos player to win the award.[8] He was also named a top-ten finalist for the Hobey Baker Award.[9] He finished his collegiate career with 60 goals and 36 assists in 132 games.[10]
After overcoming an early season injury, Polin earned a recall to the Avalanche at the mid-point the season and made his NHL debut in a fourth-line role against the Boston Bruins on January 8, 2024.[13] He later registered his first NHL goal and point, scoring to level the game at 2-2 in an eventual 7-4 victory over the Ottawa Senators on January 16, 2024.[14][15] Returning the Eagles following 7 appearances, Polin played out the remainder of the season in the AHL, posting 4 goals and 10 points through 42 regular season games.
As a restricted free agent at the conclusion of the season, Polin was re-signed to a one-year, two-way contract with the Avalanche for the 2024–25 season on July 6, 2024.[16]