Colts GM: Luck is who we thought he was, but he’s not Peyton

Andrew Luck won’t make his preseason debut until Sunday, but Colts General Manager Ryan Grigson has already seen enough to feel confident that the No. 1 overall pick was well spent. Asked what he has learned about Luck in training camp, Grigson channeled Dennis Green in his answer, saying, “That he really is what we…