Rex Grossman promises to be a “good soldier”

As an astute (and hilarious) PFT commenter pointed out last night, the Redskins’ quarterback depth chart now consists of RG3 and RG3-and-out. The old RG — Rex Grossman — has signed another one-year deal with the Redskins, and he understands that, this time around, it won’t be to compete for the starting position.  It’ll be…