ESPN’s Nate Taylor reports Mahomes, recovering from a late-season knee injury, participated “in some form and fashion ... during the Chiefs’ opening OTA practice.” The team released a video of Mahomes throwing a short pass while wearing an enormous brace on his injured left leg. Mahomes, entering his age-31 season, is in a race against the clock to be ready for Week 1 against the Broncos. If Mahomes can’t suit up for the season opener, Justin Fields would likely serve as KC’s starter.