One day after he allowed five runs in two innings to swell his earned-run average to 6.35, the Dodgers optioned right-handed reliever Peter Moylan to Triple-A Albuquerque.

Called up to take his place in the bullpen was Jose Dominguez, a 22-year-old with a 100-mph fast ball. The right-hander is highly regarded, but began the season serving a 25-game suspension for violation of the minor league drug prevention program. The specifics of his violation are unknown.

What is apparent is that Dominguez has plenty of potential. The San Pedro de Maroris, Dominican Republic native has a 1.79 ERA and 40 strikeouts against 13 walks in 25 1/3 innings this season split between Double-A and Triple-A.

“The kid’s got a good arm,” Mattingly said. “I’ve heard a lot of good reports about him. I don’t think we’re looking at him as a savior but we think he’s a quality arm who’s going to get some people out. So hopefully it’s the start of something big.”

Moylan, signed in the offseason after seven seasons with the Atlanta Braves, didn’t allow a run in his first seven appearances of the season, but has given up eight runs and three walks in his last five innings.