Raiders going with rookie Derek Carr

[JonLP24]

2. You should've been reading the reports on Schaub

before the 4th pre-season game he was showing no arm strength, playing poorly, everything indicating coach was making the wrong move regardless of what Carr was showing until he gave him no choice.

Here is a good article

This is a move the Raiders had to make. If the 2013 game film suggested that Schaub's days as an effective starting quarterback were behind him, the preseason tape slammed that idea home with authority.

Allen was forced to acknowledge what he outright denied less than 10 days ago: Schaub's arm strength is simply not NFL-caliber right now.

Whereas Schaub cannot throw convincingly beyond 10 yards, Carr was 11-of-18 for 234 yards and three touchdowns on preseason throws over 10 yards, per Pro Football Focus.

Although it's somewhat surprising that Carr has beaten Blake Bortles, Johnny Manziel and Teddy Bridgewater to the starting lineup, NFL Media's Albert Breer reported in early June that the Raiders' coaching staff expected their second-round draft pick to push Schaub.

http://www.nfl.com/news/story/0ap3000000387073/article/derek-carr-starting-over-matt-schaub-for-raiders