The Carolina Panthers will once again make a quarterback trade, announcing this week that Sam Darnold will start Sunday against the Denver Broncos. Darnold will be the third different quarterback in as many weeks to start at center for the Panthers, after Baker Mayfield started in Week 11 against the Baltimore Ravens. Carolina Panthers quarterback Sam Darnold, #14, warms up against the Baltimore Ravens at M&T Bank Stadium on November 20, 2022 in Baltimore. (Rob Carr/Getty Images)PJ Walker started at QB in Weeks 6-10, going 2-3 before suffering an ankle injury. Mayfield, who beat out Darnold in training camp after…