Deck McGuire is a big right-hander with good downhill action on his pitches. Although he has a slow arm motion, McGuire features deception and decent command. McGuire's mechanics are difficult to watch at times, but he gets the ball out of his hand quick and follows through nicely.
He controls his fastball more than he commands it, but it has nice bite and late, natural sink to it. In one late-season start that in which I saw McGuire, he got rather frustrated after getting out of tune in the middle innings, which involved giving up two runs. He quickly got himself back on track and lasted until the 7th inning.
McGuire doesn't throw that hard, but his velocity lasts until the later innings. Although I still think (along with others) that he was a slight overdraft, I can envision McGuire being a solid 4th or 5th starter for the Jays. He isn't too far away.