SANTA CLARA, CA - SEPTEMBER 12: Colin Kaepernick #7 and Eric Reid #35 of the San Francisco 49ers kneel in protest during the national anthem prior to playing the Los Angeles Rams in their NFL game at Levi's Stadium on September 12, 2016 in Santa Clara, California. (Photo by Thearon W. Henderson/Getty Images)

One NFL decision was reportedly "the final straw" that led to Colin Kaepernick choosing legal action

Colin Kaepernick isn't backing down.

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