Michael Theodore Van Ryn (born May 14, 1979) is a Canadian former professional ice hockey defenceman and current assistant coach for the Toronto Maple Leafs.

He helped the team win the National Championship, as Michigan defeated Boston College 3–2 in overtime in the final game.

Van Ryn challenged this practice in court and an arbitrator ruled that a player drafted off a college team could play one season of major junior hockey and then become a free agent.

Van Ryn played in 37 games with the Worcester IceCats of the American Hockey League, scoring three goals and 13 points during the 2000–01.

On January 1, Van Ryn earned his first career NHL point, an assist on a goal by Doug Weight, as the Blues lost to the New Jersey Devils 2–1.

Van Ryn scored his first career NHL goal on January 23 against Martin Biron of the Buffalo Sabres in a 5–2 Blues victory.

Van Ryn played in his first career playoff game on April 20, as he did not record a point in a 2-0 win over the Chicago Blackhawks.

In nine playoff games, Van Ryn was held scoreless, as the Blues lost to the Detroit Red Wings in the second round of the post-season.

In 80 games, Van Ryn scored eight goals and matched his career high 37 points, however, the club failed to reach the post-season.

In 2006–07, Van Ryn struggled offensively, scoring only four goals and 29 points in 78 games, as the Panthers once again failed to make the playoffs.

Van Ryn made his Maple Leafs debut on October 9, 2008, getting no points in a 3–2 win over the Detroit Red Wings.

Van Ryn's time with the Leafs was injury plagued, as he only appeared in 27 games with Toronto, scoring three goals and 11 points.

Van Ryn joined the Houston Aeros of the AHL as an assistant coach to the newly hired John Torchetti.

Van Ryn made his head coaching debut on September 25, 2015, as the Rangers lost to the Owen Sound Attack in overtime by a score of 5–4.

In the Rangers next game on October 1, Van Ryn recorded his first victory, as Kitchener defeated the North Bay Battalion 4–2.

Kitchener opened the season with a 13–0–3 record before Van Ryn suffered his first regulation defeat, when the Rangers lost 5–3 to the Kingston Frontenacs on November 7.

After the team finished in first place in the Pacific Division in his first season, he left the Coyotes' organization following the 2018 Calder Cup playoffs.

[7] Following his firing from the St. Louis Blues, Van Ryn was hired by the Maple Leafs to be their assistant coach ahead of the 2023–24 season.