The Detroit Tigers have signed relief pitcher Joba Chamberlain to a one year, $2.5 million contract. Chamberlain was a free agent after pitching last season for the New York Yankees. He was rookie of the year in 2008, but has struggled somewhat since. For the Yankees last seaon he pitched 42 innings and struck out 38, but walked 26. He had a 4.93 earned run average.