As the Nationals officially placed Dan Haren on the disabled list with right shoulder inflammation, they recalled outfielder/first baseman Tyler Moore to take his roster spot, giving Moore another opportunity to prove himself in the majors. Since the Nationals decided to place him on the disabled list Sunday, Haren received an MRI. The test revealed no structural damage, as Haren expected, he said in an email. He received a cortisone shot to reduce inflammation and stiffness in his shoulder, and he plans to begin throwing again in a day or two. As Haren recuperates, Moore will return to the majors. Moore, 26, began the season as the Nationals’ top right-handed hitter off the bench and become a semi-regular starting outfielder when injuries befell Bryce Harper and Jayson Werth. Following a 10-homer breakout in his rookie season, Moore slumped to a .158/.206/.274 line in 102 plate appearances this year. The Nationals sent him to Class AAA in the hope consistent at-bats would help him recapture his 2012 success. In 12 games at Class AAA Syracuse, Moore went 8 for 45 with two homers, two doubles and 15 strikeouts. He welcomed the minor league stint as a way to relax more and refocus. Moore will give the Nationals an extra outfielder in the event Jayson Werth’s left groin strain holds him out. Werth left Sunday’s game in the fourth inning, although he did not expect to miss an extended amount of time.