Dietrich played six seasons with each of the Bandits and Knighthawks. He led the Bandits to the NLL Championship game twice, in 2004 and 2006, and also won the Championship with the Knighthawks in 1997, when he was named Championship game MVP. He was named NLL Goaltender of the Year in both 2005 and 2006, and was the first goaltender to be named NLL MVP in 2006.
On November 22, 2010, Dietrich announced his retirement as a player in the NLL to become the Toronto Rock's goaltending coach.[1]
In July 2012, Dietrich was announced as the new general manager of the Buffalo Bandits, after Darris Kilgour was relieved of that title earlier in the month.[2]
On July 30, 2012, Dietrich was elected in the NLL Hall of Fame. Dietrich was the leading vote-getter, appearing on 79% of all ballots cast. The induction ceremony was held on October 2, 2012.[3]