John Elway must be agonizing over the next few roster moves.

Discovering late-round and undrafted talent is Elway's specialty as Broncos general manager. But in accordance with NFL rules, he had to release a handful of those promising players on Monday to thin out his roster.

Quaterback Zac Dysert was one such tough call. The 2013 seventh-round pick lost a position battle to newcomer Trevor Siemian and will hit the open market.

So will promising linebacker Reggie Walker, who just signed a one-year deal in May.

They won't get any easier for Elway. He still has to release three more players by Tuesday before final cuts in a week.

Here are the rest of Monday's moves:

CB Tevrin Brandon

OL Andre Davis

FB Joe Don Duncan

QB Zac Dysert

P Spencer Lanning

S Ross Madison

TE Jake Murphy

RB Jeremy Stewart

LB Chase Vaughn

(h/t ESPN)