Minnesota Vikings head coach Dennis Green walks onto the field prior to a game. Circa the 1990's. (Icon Sportswire via AP Images)

Minnesota Vikings head coach Dennis Green gestures during the game against the San Francisco 49ers, Sunday, Dec. 7, 1997, at San Francisco's 3Com Park. The 49ers beat the Vikings 28-17. Green is a former 49ers assistant coach. (AP Photo/Steve Castillo)

Minnesota Vikings head coach Dennis Green just before the game during the 1990's (AP Photo/Kevin Reece)

Arizona Cardinals head coach Dennis Green on the sideline in a game verse the Seattle Seahawks on Sunday December 26, 2004 in Seattle. (AP Photo/Kevin Reece)

Arizona Cardinals coach Dennis Green yells from the sidelines against the Pittsburgh Steelers during the first quarter of a preseason NFL football game at Cardinals Stadium on Saturday, Aug. 12, 2006, in Glendale, Ariz. It was the first game for the Cardinals in their new stadium. (AP Photo/Roy Dabner)

GLENDALE, AZ - OCTOBER 16: Head coach Dennis Green of the Arizona Cardinals watches the action from the sidelines against the Chicago Bears during a game at University of Phoenix Stadium on October 16, 2006 in Glendale, Arizona. The Bears defeated the Cardinals 24-23. (AP Photo/Scott Boehm)

Arizona Cardinals' head coach Dennis Green, right, talks with Larry Fitzgerald in the first quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Dec. 24, 2006. The Cardinals won 26-20. (AP Photo/Jeff Chiu)

Arizona Cardinals head coach Dennis Green watches from the sidelines as his team competes against the St. Louis Rams during the second quarter of an NFL football game in Glendale, Ariz., Sunday, Sept. 24, 2006. (AP Photo/Rick Hossman)

American team head coach Dennis Green hugs National team head coach Dick Vermeil after the National team wins the NFLPA Collegiate Bowl, 31-17, at the Stub Hub Center on Saturday, January 18, 2014, in Carson, Calif. (Ric Tapia/AP Images for NFLPA)

American team head coach Dennis Green speaks to his players in the locker room before the start of the NFLPA Collegiate Bowl at the Stub Hub Center on Saturday, January 18, 2014, in Carson, Calif. (Ric Tapia/AP Images for NFLPA)