[3] On November 27, 2007, DeCaster signed a minor league contract with the Washington Nationals with an invitation to spring training.
He was assigned to the Double-A Harrisburg Senators to begin the season, but was promoted to the Triple-A Columbus Clippers in April 19.
[4] In December 2008, DeCaster signed a minor league contract with the Detroit Tigers but was released on April 1, 2009.
He spent most of 2012 with the independent Winnipeg Goldeyes of the American Association, playing for one week in June with the Olmecas de Tabasco in the Mexican League.
In the 2012-13 winter league season, he played Tigres de Chinandega in Nicaragua and won the Triple Crown, hitting .417 with 13 home runs and 56 RBI.
[8] DeCaster started 2013 with the Acereros de Monclova in Mexico before returning to Winnipeg in August.
[4] He hit for a combined .315 average in 94 games for both teams, including 13 homers, 64 RBI, and a .461 slugging percentage.
In 2009, he lined a ball hard off of first baseman Willy Aybar, who received an error on the play, to drive in the winning run in the bottom of the 11th inning against the Dominican Republic team, securing the Netherlands a second-round berth in Pool 2.
[22] DeCaster's nephew Reangelo de Caster played for Curaçao in the 2022 Little League World Series.