Meredith started having elbow problems about two weeks ago while throwing his first bullpen session of the spring. He was hoping that the pain was caused by scar tissue breaking up inside the elbow.
Meredith took time off and then started feeling pain Friday while playing catch. This past offseason, Meredith had bone chips removed from the elbow.
Meredith signed a Minor League deal with the Nationals last month. He was competing for a spot in the bullpen. Last season, Meredith played for the Orioles and allowed nine runs over 15 innings.
"If he didn't make the team, he would have been a nice option to have in the Minor Leagues," manager Jim Riggleman said. "He was the unlucky one this year. It has happened all over baseball."