[1] Ferschweiler began his collegiate career with the Western Michigan Broncos in 1990, having previously played for the Rochester Mustangs of the USHL.
Although Swiss side ZSC Lions would ultimately win the Cup, the Knights would take the silver medal and their performance in the competition was considered to be the best by a British team at the time.
In 2004, Ferschweiler took on the role of general manager and head coach of the Russell Stover Under-18 team of the Midwest Elite Hockey League.
The Broncos enjoyed their best season in years, leading to an appearance in the 2011 NCAA Division I Men's Ice Hockey Tournament.
After the 2010–11 season, Blashill departed WMU for an assistant coaching position with the Detroit Red Wings of the National Hockey League.
[1] Ferschweiler joined the Grand Rapids Griffins of the AHL as an assistant coach for the 2014–15 season, replacing Jim Paek.
On June 23, 2015, Ferschweiler, Tony Granato, Chris Chelios, and Dave Noel-Bernier were named assistant coaches for the Detroit Red Wings of the NHL.
[14][15] Ferschweiler had earlier been mentioned in news reports as a candidate for the Griffins head coaching job, which ultimately went to Todd Nelson.
[16] Whilst at the Red Wings, Ferschweiler also served as an Assistant coach with the USA U-18 team as they competed in the Hlinka Gretzky Cup.