Six players, including McFadden, did not practice for the Raiders on Wednesday: quarterback Jason Campbell (collarbone), cornerback Chimdi Chewka (hamstring), kicker Sebastian Janikowski (hamstring), cornerback Chris Johnson (groin, hamstring), linebacker Rolando McClain (ankle) and McFadden (foot).
McFadden was reported leaving the team building on crutches and still with a protective boot on Wednesday, according to Steve Corkan of the Contra Costa Times. He could miss Sunday's game, which would give Michael Bush the start in the backfield.
Two other Raiders- safety Michael Huff (ankle) and center Samson Stele (knee) were limited in practice.
Three Broncos players- safety Quinton Carter (concussion), tight end Virgil Green (neck) and cornerback Cassius Vaughn (hamstring) did not practice on Wednesday. Meanwhile, tackle Orlando Franklin (groin) and running back Willis McGahee (hand) were limited. Running back Knowshon Moreno could get the starting nod if McGahee misses his second straight week this Sunday.
Oakland hopes to have McFadden back on offense against the Broncos as new quarterback Carson Palmer prepares to make his first start as a Raider. Judging by Wednesday's practice, however, it appears that McFadden may be watching from the sideline on Sunday.