The rookie out of the University of Texas was 7-for-15 passing for 87 yards, and rushed for 44 yards on four attempts.
Tennessee was out-gained in total net yards, 427-197, but forced five Houston turnovers.
In a rough day, David Carr completed 15 of 21 passes for 113 yards, but threw an interception and lost two fumbles.
His replacement, Sage Rosenfels, was 18-for-25 for 186 yards, three touchdowns and one interception.
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