Morrison returns for his third season with Grand Prairie, sixth in minor league baseball.
In 2009, Morrison recorded 20 saves with a 4-3 record and a 4.06 ERA. He struck out 40 in 57.2 innings pitched.
In 2008, Morrison tallied 19 saves with a 3-1 record and a 2.81 ERA.
Morrison was selected by Boston Red Sox in 27th Round (812nd overall) of 2000 MLB draft. He played one season of affiliated ball in the Red Sox single A level.