Twitter reacts to Andrew Luck's appearance at the national championship game

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Former Indianapolis Colts quarterback Andrew Luck appeared at the national championship game between Alabama and Georgia.

He greeted fans — notably his former center Ryan Kelly, an Alabama alum — and joined Heisman Trophy winner Robert Griffin III for a pregame interview Monday night at Lucas Oil Stadium.

Twitter had plenty of reaction to see Luck, who definitely isn't at his NFL playing weight.

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This article originally appeared on Indianapolis Star: Twitter reacts to Andrew Luck at the national championship game