Robert Griffin III -- The Buck Stops With Me ... Especially At Team Dinners

Robert Griffin III knows ... when he goes out to dinner with the Redskins running backs and wide receivers, he's usually the one picking up the check.

Robert says he doesn't even mind -- says it's good team bonding. And that's great.

But a free meal is HUUGE for guys like superstar running back Alfred Morris -- who, despite being one of the best players in the league, is stuck in his lowly rookie contract worth $2 mil over 4 years.

Dirt poor by NFL standards.

Now that DeSean Jackson's on the team -- after signing a $24 million contract -- he'll probably get a few dinner checks coming his way in the near future, too.