San Francisco 49ers quarterbacks Blaine Gabbert, left, and Colin Kaepernick throw during NFL football training camp Sunday, July 31, 2016, in Santa Clara, Calif.
San Francisco 49ers quarterbacks Blaine Gabbert, left, and Colin Kaepernick throw during NFL football training camp Sunday, July 31, 2016, in Santa Clara, Calif. Marcio Jose Sanchez AP
San Francisco 49ers quarterbacks Blaine Gabbert, left, and Colin Kaepernick throw during NFL football training camp Sunday, July 31, 2016, in Santa Clara, Calif. Marcio Jose Sanchez AP