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PHILADELPHIA, PA - AUGUST 22: Head linesman Maia Chaka #136 talks to DeMarco Murray #29 of the Philadelphia Eagles during the game against the Baltimore Ravens on August 22, 2015 at Lincoln Financial Field in Philadelphia, Pennsylvania. The Eagles defeated the Ravens 40-17. (Photo by Mitchell Leff/Getty Images)

PHILADELPHIA, PA - AUGUST 22: Head linesman Maia Chaka #136 talks to DeMarco Murray #29 of the Philadelphia Eagles during the game against the Baltimore Ravens on August 22, 2015 at Lincoln Financial Field in Philadelphia, Pennsylvania.  The Eagles defeated the Ravens 40-17. (Photo by Mitchell Leff/Getty Images)