Tim Tebow starting job in jeopardy?

Broncos HC John Fox refused to commit to Tim Tebow as his starting QB after getting shellacked by the Lions on Sunday.  For the 2nd-straight week, Tebow was abysmal as a passer.  He completed just 46% of his throws and averaged a laughable 4.4 yards per attempt.  Tebow continues to show no pocket presence and struggle with accuracy.  We doubt the Broncos will go back to QB Kyle Orton, and they're not desperate enough to go to QB Brady Quinn just yet.  Look for Tebow to start next weekend's game against the Raiders, but his leash is shortening.