Siemian (left shoulder) was able to throw at practice Thursday, ABC's Troy Renck reports.
Renck adds that "all things considered (Siemian looked) good on handoffs and in light throwing" Thursday, developments that boost the QB's chances of starting Sunday's 4:05 ET contest against the Falcons. That said, coach Gary Kubiak has previously stated his willingness to take the Broncos' Week 5 QB decision "all the way up to game day." If Siemian is unable to start this weekend, Paxton Lynch would be in line for the assignment.