John Fox said Tim Tebow will start at quarterback for the Broncos in Week 9. "For this week, yes," Fox said. Fox made it clear, however, that Tebow needs to quickly improve as a pocket passer to remain the starter beyond Week 9's game against the Raiders. "I think at the end of the day, we've got to see if he can improve and get better in the passing game," Fox said. Tebow has completed less than 50 percent of his passes and been sacked 13 times in his two starts, including a win at Miami in which he played poorly for 55 minutes.