The Nationals reinstated reliever Ryan Mattheus from the 15-day disabled, giving the rookie a chance to finish his first major league season on a positive note and to answer any health concerns entering the offseason.

Mattheus last pitched Aug. 25, when he experienced a sharp decrease in velocity the Nationals attributed to a tired shoulder. Mattheus underwent Tommy John surgery in 2009, and he appeared in 54 games this season between the minors and majors after appearing in just 29 over 2009 and 2010 combined.

After a series of bullpen sessions and long toss, Mattheus said he feels back to “normal” with his arm and can be used the same way he had been before.

“It felt good to see my name on the lineup card,” Mattheus said.