(AP Photo/David Goldman)

The Nationals placed right-handed pinch hitter Scott Hairston on the disabled list with an oblique strain and replaced him outfielder/first baseman Tyler Moore from Class AAA Syracuse.

With Bryce Harper out of the Nationals’ lineup Sunday, Hairston likely would have received his first start of the season. But Thursday in New York, he felt a twinge in his oblique muscle. He tried to play through an even took an at-bat last night, popping up to first base as a pinch hitter.

“It came to a point where I was feeling it more and more each swing,” Hairston said. “If you have an issue going on, it’s not going to get better unless you rest it.”

Oblique strains, one of baseball’s most common injuries, typically keep hitters on the disabled list for four to six weeks. Hairston expressed optimism he can return sooner.

“I don’t think it’s anything too severe,” Hairston said. “If I were to guess, it wouldn’t be that long. I’ve done it before to where it’s taken that long. This is probably, of the three times that I’ve done, the least amount of pain I’ve been in.”

Moore, a main piece of the Nationals’ bench the past two seasons, was one of the last players the Nationals trimmed from their roster in spring training. Manager Matt Williams said he wanted Moore to remain fresh and receive many at-bats in event the Nationals needed to summon him to the majors. In one game at Syracuse, Moore went 0 for 4.