Left-hander Cedeno joins Nats' bullpen

WASHINGTON -- Left-handed pitcher Xavier Cedeno arrived at Nationals Park on Monday morning after being recalled from Triple-A Syracuse. He's wearing No. 64 and will work out of the bullpen.

"I feel good. I'm ready to go," Cedeno said. "I've been throwing the ball good lately, and hopefully I can keep doing what I'm doing."

Cedeno was called up after starter Ross Detwiler was placed on the 15-day disabled list with an oblique strain. The 26-year-old reliever allowed one earned run in 10 2/3 innings while with Syracuse, with 14 strikeouts. He started the season with the Astros before the Nationals selected him off waivers on April 23, giving up eight runs in 6 1/3 innings over five games with Houston.

"I know a little bit about him," manager Davey Johnson said Monday. "He was in Houston. He throws in the low 90s. … He's an option for today. I'm not sure who we want to dress after today and what we'll do after tomorrow. Maybe after tomorrow, we'll do something with him the next day."

Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the time. He also could be found on Twitter @WashinNats. Tom Schad is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.