Nationals relief pitcher Matt Belisle leaves the game with an injury on April 26. (Jonathan Newton/The Washington Post)

The Nationals have less than 10 days to make a decision on right-handed pitcher Matt Belisle.

After being placed on the disabled list with a right calf strain on April 27 and being sent to AAA Syracuse on a rehab assignment, Belisle has pitched on back-to-back days.

Belisle has pitched 11 innings in nine games since his rehab assignment began. Most recently, he pitched on June 10 and June 11, throwing 38 pitches combined, 28 of them strikes, in two innings of work.

Nationals manager Dusty Baker has said previously that Belisle needed to pitch on consecutive days before being ready to return to Washington.

“What’s going on is that he’s pitching as needed down there,” Baker said on Sunday. “And we gotta make a decision here pretty soon because his 30-day time is up. We’re still trying to make a decision who. It’s gonna be tough. But I just can’t tell you any more now than five minutes ago because we don’t know. It is what it is. We just have to wait and see.”

Baker’s decision is going to be difficult, as the pitcher the Nationals brought up to fill in for Belisle was left-hander Sammy Solis. Solis has been red hot since moving up, seeing action in 18 innings in 14 games, with 21 strikeouts.