It really has nothing to do with "game managers" at all. It says a lot about the talent on the rest of the team, just like when Cassell "managed" his way to 11 wins in NE.
The difference is between saying, "just don't do anything to screw us up" because we don't believe you can do any more than play that role, and saying that because we don't need you to do any more than that. Both players are game managers, and even great players that can't dial it back aren't worth being out there.

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