St. Louis Rams running back Tre Mason (27) celebrates after scoring on a touchdown run next to San Francisco 49ers defensive back Dontae Johnson (36) during the first half of an NFL football game in Santa Clara, Calif., Sunday, Jan. 3, 2016.
St. Louis Rams running back Tre Mason (27) celebrates after scoring on a touchdown run next to San Francisco 49ers defensive back Dontae Johnson (36) during the first half of an NFL football game in Santa Clara, Calif., Sunday, Jan. 3, 2016. Marcio Jose Sanchez AP
St. Louis Rams running back Tre Mason (27) celebrates after scoring on a touchdown run next to San Francisco 49ers defensive back Dontae Johnson (36) during the first half of an NFL football game in Santa Clara, Calif., Sunday, Jan. 3, 2016. Marcio Jose Sanchez AP