Siemian, who has won the job in back-to-back training camp battles, threw three interceptions in Monday night's 29-19 loss to the Kansas City Chiefs.
Because the Broncos are on a short week and leave for Philadelphia after Friday's practice, Joseph is expected to share his decision with Siemian and Osweiler Wednesday morning, then the rest of the players at the team meeting.
"When you lose three in a row and how we've lost the football games again with yesterday on offense for turnovers, I think everything is up for discussion", stated Joseph. "To win, we've got to stop that", Joseph told reporters following the loss. "Obviously like most coaches would do and see but tonight, our defense played winning football in my opinion. It all fell back to turning the ball over five times, that's insane". Guys work too hard along with coaches and players to have a big game and give it away five times.More news: Everton links not shifting Dyche focus as Burnley go seventh
By Tuesday afternoon, Joseph wasn't ready to commit to a quarterback.
Broncos president of football operations/general manager John Elway said Osweiler could undergo "football rehab" with the Broncos. "But right now we're giving games away and all four losses look the same". You can't win if you can't score. Peyton Manning's former longtime backup flopped previous year in Houston and was released this summer by the Browns, who are still paying 95 percent of his $16 million salary.
Former first-round pick Paxton Lynch isn't in the mix, Joseph said, because he's only practiced a handful of times in the two months since he sprained his throwing shoulder in the preseason shortly Siemian beat him out for the second straight summer. Siemian had completed just 5-of-14 passes for 56 yards and two interceptions by halftime, compiling an 8.9 rating.
"The next game comes up pretty quick", he said.