Washington Nationals third baseman Carlos Rivero throws during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)

Photo by: David J. Phillip

Washington Nationals third baseman Carlos Rivero throws during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)