"It is not that Bubby Brister has not played at the level I think he can. It's that Brian Griese has played so well throughout camp and preseason games that I think he deserves that opportunity," coach Mike Shanahan said.
"All blame doesn't go to one person," Shanahan said.
Brister inherited the job after winning four straight games as a starter last year when Elway was out with assorted injuries.
The 37-year-old Brister has struggled in the preseason, however, twice throwing interceptions on his first pass attempt of a game.
The two-time Super Bowl champions are 2-2 in preseason play.
Griese, 24, who led Michigan to a Rose Bowl victory and a shared national championship in 1998, has never started an NFL game. He is the son of Hall of Fame quarterback Bob Griese of the Miami Dolphins.
The Broncos added quarterback insurance last spring by signing veteran Chris Miller, who was out of football three years because of recurring concussion. Miller however hasn't played since first preseason game cause of persistent tendinitis in throwing elbow.
©1999 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed