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SANTA CLARA, CA - OCTOBER 7: Fred Warner #48 of the San Francisco 49ers defends during the game against the Arizona Cardinals at Levi Stadium on October 7, 2018 in Santa Clara, California. The Cardinals defeated the 49ers 28-18. (Photo by Michael Zagaris/San Francisco 49ers/Getty Images)

SANTA CLARA, CA - OCTOBER 7: Fred Warner #48 of the San Francisco 49ers defends during the game against the Arizona Cardinals at Levi Stadium on October 7, 2018 in Santa Clara, California. The Cardinals defeated the 49ers 28-18. (Photo by Michael Zagaris/San Francisco 49ers/Getty Images)