From the LAT
Mustain, 6 feet 3 and 205 pounds, had been contemplating transferring to either USC or Tulsa. He visited USC in February and also watched the Trojans scrimmage at the Coliseum this month.
Mustain could not be reached for comment. Coach Pete Carroll declined to comment.
Mustain passed for nearly 900 yards and 10 touchdowns in 2006. He will not be eligible until the 2008 season, when he is expected to compete with Mark Sanchez and Aaron Corp for playing time. Former Razorback receiver Damian Williams, who transferred to USC in January, also will be eligible in 2008
While this isn't an "official" announcement it's one more layer peeled off the onion of a story that has been brewing for a while now. I'm sure Mustain's observations at the Trojan Huddle a couple of weeks ago were the last pieces of the puzzle he needed to make his decision. Of course an official announcement would be nice to hear but this is as close as it will get for the time being.