Complex sentence: On April 19,2009, Timlin was honored by the Red Sox, who had him throw out the ceremonial first pitch at the day's game and declared it "Mike Timlin Day" at Fenway Park.
Split into simpler sentences: On April 19,2009, Timlin was honored by the Red Sox. He thew out the ceremonial first pitch on "Mike Timlin Day" at Fenway Park.