McGee, who was sacked twice, forced a throw to Martin Rucker in the end zone on the first possession of the game and was intercepted.
"I should have just put more velocity on it," McGee said. "In that situation, I got a little greedy and floated it in there. It was a poor throw and I think even a worse decision. In that situation early in game, on the 2-yard line, I was taking points off the board. That's disappointing for me. I feel like I'm a lot better decision maker than that."
McGee finished the preseason 52-for-81 for 610 yards with three touchdowns and one interception. Making his first start of the preseason, McGee seemed to settle down after a rough first possession. He was helped by a 48-yard screen pass to DeMarco Murray on the first play of the game and he also connected on some good throws to Manuel Johnson, Raymond Radway and Martin Rucker.
"I felt like I had a really productive preseason practice-wise and in the games," McGee said. "I just tried to, as Coach [Jason] Garrett says, go up there and swing the bat, take a shot and try to get the guys in and out of the huddle. I think the big thing for me this season, being the oldest guy in the huddle most of the time, was getting guys lined up right and executing ball plays."