The return of a healthy Brian Matusz would be a welcome development for an Orioles rotation in flux. However, the young left-hander appears to be several weeks away from making his 2011 debut.

The Orioles had initially hoped that Matusz would rejoin the club on their 11-day homestand, which begins Monday, and start throwing bullpen sessions off the mound in front of pitching coach Mark Connor and bullpen coach Rick Adair. But Orioles manager Buck Showalter said Sunday that the 24-year-old is still feeling effects from a strained left intercostal muscle and hasn't been cleared to throw off the mound. He'll remain on a throwing program at the team's spring training complex in Sarasota, Fla., for the time being.

"I don't expect him to join us anytime soon," Showalter said. "He'll be down there. I wouldn't place a closed end on it. It's still open. We'll see how he feels the next few days. We're not going to rush that. J.J. [Hardy] is feeling a little bit better. Good to see some progress with him. Both those injuries are something that are very inexact with the timeframe. History will show you that if you try to get ahead of yourself, you're going to regret it, so we're not going to do that."

Showalter was adamant that Matusz, whose disabled list stay is backdated to March 30, hasn't had any setbacks and the lefty just still feels lingering, minor discomfort when he throws.

"In a zero to 10 scale of how much you feel it, it is a one," Showalter said. "But as long as that one is there, we're not going to push forward. We hope that one goes away in the next day or two."