Raiders coach Jack Del Rio, left, greets Cincinnati Bengals coach Marvin Lewis near the dirt on the Coliseum field on Sept. 13, 2015. Because the Raiders share their home field with the A’s, the infield dirt stays until the baseball team’s season ends.
Raiders coach Jack Del Rio, left, greets Cincinnati Bengals coach Marvin Lewis near the dirt on the Coliseum field on Sept. 13, 2015. Because the Raiders share their home field with the A’s, the infield dirt stays until the baseball team’s season ends. Tony Avelar Associated Press file
Raiders coach Jack Del Rio, left, greets Cincinnati Bengals coach Marvin Lewis near the dirt on the Coliseum field on Sept. 13, 2015. Because the Raiders share their home field with the A’s, the infield dirt stays until the baseball team’s season ends. Tony Avelar Associated Press file