PHOENIX - FILE: Starting pitcher Edwin Jackson #36 of the Arizona Diamondbacks pitches against the San Diego Padres during the major league baseball game at Chase Field on April 6, 2010 in Phoenix, ... more 

PHOENIX - FILE: Starting pitcher Edwin Jackson #36 of the Arizona Diamondbacks pitches against the San Diego Padres during the major league baseball game at Chase Field on April 6, 2010 in Phoenix, Arizona. According to reports on February 2, 2012 the Washington Nationals and Jackson have agreed on a one year deal. (Photo by Christian Petersen/Getty Images) less