San Francisco 49ers' Blaine Gabbert, left, and Colin Kaepernick, right, warm up before an NFL football game against the Carolina Panthers in Charlotte, N.C., Sunday, Sept. 18, 2016.
San Francisco 49ers' Blaine Gabbert, left, and Colin Kaepernick, right, warm up before an NFL football game against the Carolina Panthers in Charlotte, N.C., Sunday, Sept. 18, 2016. Bob Leverone AP
San Francisco 49ers' Blaine Gabbert, left, and Colin Kaepernick, right, warm up before an NFL football game against the Carolina Panthers in Charlotte, N.C., Sunday, Sept. 18, 2016. Bob Leverone AP