Gregg Popovich Stepping Down Leaves Mike Tomlin Stepping Up

(AP) – Gregg Popovich stepped down. Mike Tomlin moved up. The decision by Popovich to end his run as coach of the San Antonio Spurs means that the longest active tenure by any coach in any of the four U.S. major pro sports had ended. Popovich lasted nearly 29 years as coach of the Spurs. And now, it’s Tomlin’s turn. Tomlin, the coach of the NFL’s Pittsburgh Steelers, started in his current role in 2007, meaning he takes over for Popovich as the longevity in-one-place leader among the major pro leagues in the U.S.