He served as the interim head football coach at the United States Naval Academy for three games in 2001, following the firing of Charlie Weatherbie.
Lantz also coached the Berlin Thunder and Rhein Fire of NFL Europe.
Berlin won World Bowl XII, 30–24, over the Frankfurt Galaxy on June 12, 2004, in Gelsenkirchen, Germany.
[2] The following year, the Thunder fell in World Bowl XIII, 27–21, to the Amsterdam Admirals on June 11, 2005, in Düsseldorf, Germany.
Lantz took the reins of the Rhein Fire in 2007, the final season of NFL Europe.