Checked the Broncos Depth Chart. They are going to need to bring another QB in. Allen, Flacco, and Lock ar ethe only QBs on the roster, and Flacco and Lock are not healthy. They either bring in a street free agent QB, or they make a trade by 4:00 tomorrow.
Rosen/Fitz, Beathard, Foles all seem like they could be had with only Foles being expensive. Any of those guys, or Colin Kaepernick are probably an upgrade over Brandon Allen and possibly even over Flacco, although you never know with Allen since he has never thrown a pass in an NFL game.