College On 13 May 2020, Shlaine committed to play
college ice hockey at
Connecticut, after originally committing to play at
Boston University. During the
2020–21 season, in his freshman season, he recorded one goal and eight assists in 23 games. He led the Huskies and
Hockey East in face-off win percentage at 60.2 percent, winning 162 face-offs. During the
2021–22 season, in his sophomore season, he recorded seven goals and ten assists in 36 games. He led his team in face-off win percentage at 57.6%. During the
2022–23 season, in his junior season, he recorded 11 goals and 21 assists in 38 games. During the
2023–24 season, in his senior season, he recorded ten goals and 13 assists in 27 games. He led the Wildcats with 315 face-off wins and led the CCHA with a face-off win percentage of 58.8%. On 10 November 2023, in a game against
Lake Superior State, he recorded his first career
hat-trick. On 10 April 2024, he transferred to
Arizona State. He missed the first six games of the season due to injury. During the
2024–25 season, as a graduate student, he recorded 17 goals and 21 assists in 31 games. Following the season he was named to the
All-NCHC First Team and
AHCA West Second Team All-American. He became only the second player in program history to earn All-American honors. He was also named a finalist for the
NCHC Player of the Year and
NCHC Forward of the Year.
Professional On 31 March 2025, Shlaine signed an
Amateur tryout (ATO) with the
Texas Stars of the AHL. ==Career statistics==