I heard this on the lunch break with Clarence Carter (dc.com) a defensive lineman who shall remain nameless (I believe Glover) said this is not the same Rivera he has no leg drive/strength that the back injury took it from him and it is going to need time (read another offseason) before he will be what he was...
The plan was to have Rivera help the youth (read should have been Rogers now Pettite) on the right side requiring less or no chipping on that side of the line for the RB's/TE's but since Rivera can't even hold his own it has left the right side of the oline a real mess...also heard it is effecting the center.. so in essence Rivera has negatively impacted C, RG, RT...IF this is so and the coaches know this (which I believe they would) what does it say about Peterman...