According to Bill Ladson of MLB.com and  Danny Knobler of CBS Sports, the Washington Nationals have released pitchers Shawn Estes and Eddie Guardado.

Estes, 37, was signed to a Minor League contract in early February. The 1997 All Star has a career 101-93 record with a 4.71 ERA. He last pitched in the Majors in 2008 with the San Diego Padres when he went 2-3 with a 4.74 ERA in 9 games (8 games started). You can see Estes’ contract history and statistics here.

Gaurdado, 39, has pitched for the Twins, Mariners, Reds and Rangers.  He was 1-2 with a 4.46 ERA in 48 games with the Rangers in 2009.  You can see Guardado’s statistics here.