With Tomlin leaving, Spoelstra becomes longest tenured active coach in major US sports
Erik Spoelstra is now No. 1. The end of Mike Tomlin's 19-year tenure as coach of the Pittsburgh Steelers on Tuesday meant Spoelstra — who has coached the Miami Heat since 2008 — is now the longest-serving among active coaches in the four biggest U.S. major sports leagues. “That really bummed me out,” Spoelstra said Tuesday.