The Philadelphia Phillies left David Robertson off the NLDS roster after the reliever hurt himself in the club's Wild Card Series victory over the St. Louis Cardinals.

Rob Thomson said Robertson strained his right calf jumping up in the air when Bryce Harper homered against the Cardinals in the last round.

"He's devastated," Thomson said of Robertson. "He knows how big a part he is to this club."

After coming over in an August trade with the Chicago Cubs, Robertson had six saves in 11 games with a 2.70 ERA.