Although Mark Sanchez worked with the starters on the first day of training camp, Siemian is expected to get half of the first-team reps, the Denver Post reports.
Siemian will likely replace Sanchez as the first-team QB on Friday, with head coach Gary Kubiak saying he'll switch things up on a day-to-day basis. Meanwhile, rookie Paxton Lynch is technically part of the competition, but he isn't expected to get any first-team reps during the early part of camp.