Nationals minor leaguers 3B Carter Kieboom, RHP Mason Denaburg, RHPAldo Ramirez, RHP Richard Guasch, LHP Tim Cate, and C Israel Pineda have all become free agents.
Both Kieboom and Denaburg were once first-round picks for the Nationals but neither of them has panned out. Kieboom did hit .265 in 91 games in Triple-A this season with seven home runs and a 13 percent walk rate, so he will likely get a minor league contract with another organization this off-season.