San Francisco 49ers offensive tackle Alex Boone (75) warms up before an NFL football game against the Kansas City Chiefs in Santa Clara, Calif., Sunday, Oct. 5, 2014.
San Francisco 49ers offensive tackle Alex Boone (75) warms up before an NFL football game against the Kansas City Chiefs in Santa Clara, Calif., Sunday, Oct. 5, 2014. Marcio Jose Sanchez AP
San Francisco 49ers offensive tackle Alex Boone (75) warms up before an NFL football game against the Kansas City Chiefs in Santa Clara, Calif., Sunday, Oct. 5, 2014. Marcio Jose Sanchez AP
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