Colt McCoy's addition to the San Francisco 49ers prompted a quick Twitter response from the verified account associated with Earl Thomas, the Seattle Seahawks' Pro Bowl safety.Colt McCoy vs. Alex Smith Thru 21 Starts"is this a april fools joke," Thomas wrote.McCoy, a third-round choice of the Cleveland Browns in 2010, has struggled to this point in his career. Thomas, who played with McCoy at the University of Texas, has supported his former teammate in the past -- to an extent that made a dismissive tweet from Thomas seem incongruous.