Rosen came into the UCLA starting lineup and impressed in his rookie campaign .
Rosen Bio : Rosen was a big time quarterback prospect while playing his high school ball at St. John Bosco in Belflower California .
quarterback prospect came into the UCLA starting lineup and impressed in Rosen Bio : Rosen 's rookie campaign .
Rosen Bio : Rosen was a big time quarterback prospect while playing his high school ball at St. John Bosco in Belflower California .