Back Up QB Race Tight

From what I've seen in the last couple of games , Keith Null may have a tough time making the roster. Looks to me as the Rams may have found themselves a real gem in rookie QB Thadius Lewis. His last two games have in themselves have been quite noteworthy.

The first shot he got to play was against the Pats where he went 11 of 14 for 120 yards passing, 1 TD and ended with a QB rating of 96.4. In his next game he went 6 of 8 for 89 yards, 1 TD and ended with a 150.5 QB rating! Amazing numbers especially when his rookie counterpart Bradford had the near perfect rating of 153.5 in the same game! Is it possible that the Rams have maybe found themselves a QB duo? Is it possible that the Rams might be blessed with two top notch quarterbacks? Stranger things have happened.

Unless I'm missing something in the overall scheme of things, I find it hard to believe that the coaching staff would choose Null over Lewis.