Tanner Roark pitched 1 1/3 scoreless innings and struck out three in relief Sunday against the Tigers.
Tanner Roark was roughed up by the Mets on Saturday, surrendering four runs in 2 2/3 innings.
Tanner Roark surrendered two runs in two innings of relief Monday against the Braves.
Nationals manager Matt Williams hinted Saturday that Tanner Roark could be used in a variety of roles during the 2015 season.
Tanner Roark will pitch out of the bullpen in the NLDS.
Bill Ladson of MLB.com reports that "all indications" are that Tanner Roark will be used out of the bullpen in the NLDS.
Tanner Roark improved to 15-10, limiting the Mets to two runs over 6 1/3 innings as the Nationals hung on to win on Tuesday.
Tanner Roark hurled seven shutout innings against the Braves on Tuesday as the Nationals clinched the NL East division.
Tanner Roark gave up 11 hits and four runs over 6 1/3 innings in Sunday's loss to the Mariners.
The Nationals have no plans at this point to skip Tanner Roark's turn in the rotation in order to keep his innings down.
Tanner Roark was excellent on Wednesday, shutting the D'Backs out in seven innings, but was left with a no-decision.
Tanner Roark allowed three runs in 5 2/3 innings Friday in a 5-4 win over the Pirates.
Tanner Roark pitched seven innings of one-run ball against the Braves on Saturday.
Tanner Roark delivered seven innings of one-run ball Wednesday in the Nationals' 4-3 defeat of the Marlins.