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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 to teach the new RG the Kyle Shanahan offense.

“I know they’re going to draft a franchise QB,” Grossman told ESPN 980 on Saturday night. “If I’m on the team, I’m gonna help out that guy get up too speed, but I’ll also be ready to play. I’m gonna be a good soldier, and I’ll be busting my ass to help him out.”

Grossman is on this third one-year contract with the Redskins. He started 13 games in 2011, after getting three starts during the McNabb misadventure of 2010.

“Beyond the business side of it, I love all my teammates, I love the system,” Grossman said. “I really want to see this thing through and see the Redskins turn this thing around.”

It’s a great attitude, and it’s exactly what the Redskins need: a backup quarterback who knows his role, and who does his job at a reasonable price. A tenth-year veteran who under the CBA commands a minimum salary of $925,000, the Redskins presumably signed him pursuant to the minimum-salary benefit, which keeps his cap number at $540,000.

The return of Grossman could mean that another quarterback will be losing his job. John Beck remains under contract, at a base salary of $1.3 million. With the Redskins doing everything they can to create cap room, don’t be surprised if the soon say buh-bye to Beck.