Too bad for him, I wish him the best.
Source: QB Steven Threet calls it career
Threet, who will be a senior in 2011, has suffered four concussions, three of which occurred last season. The source said Threet is still suffering from post-concussion syndrome and deals with constant headaches.
"Doctors have told him a fifth concussion could be debilitating," said the source. "You don't want to be 35 years old and can't hold up a cup of coffee."
Last season, Threet completed 62 percent of his passes, throwing for 2,534 yards with 18 touchdowns and 16 interceptions for the Sun Devils. He was sacked 23 times for ASU (6-6). It was his first season of play since transferring from Michigan, where he was the Wolverines' starting quarterback in 2008.
The 6-5, 240-pound Threet, who is on schedule to graduate in December, will likely remain close to the program and help as a student assistant and work with the QBs, the source said.
Arizona State begins spring football in the last week of March. Rising junior Brock Osweiler, who started the final two games of the 2010 season (both Sun Devils wins), is expected to be the team's No. 1 quarterback.