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[UPDATE, 9:01]: Stephen Strasburg will throw a simulated game Tuesday in Colorado with the aim of coming off the disabled on or shortly after June 16, the first day he is eligible, Manager Davey Johnson said.

Strasburg played catch again this afternoon. He felt strong enough, Johnson said, that pitching coach Steve McCatty had to step in and slow him down.

“He went out early and he was throwing,” Johnson said. “He threw a lot before Cat got there. He was feeling real frisky, and Cat had to cut him short. But he’s champing at the bit to get back on the rubber.”

[Original post] Left-hander Ross Detwiler will pitch in a minor league rehab game Saturday at Class A Potomac and could return to the rotation on either June 13 or 14, Manager Davey Johnson said.

Detwiler has been sidelined since May 16 with a right oblique strain. He appeared ready to come off the disabled list shortly after he was eligible, but he aggravated the injury in a bullpen session he now believes may have come too soon. Detwiler has been frustrated with having to sit out, and he does not want to rush back again.

“What’s it been, about a month or something?” Detwiler said. “It feels like it’s taken a lot longer than three weeks. I’m just trying to focus on if I feel anything or not, just to make sure if we need to take any more time off, it’s like another week instead of another month.”

Detwiler would throw 40 to 50 pitches in his rehab start, Johnson said. He would likely bump rookie Nate Karns back out of the rotation, unless the Nationals choose to shift Karns and have him take over Stephen Strasburg’s spot.

Strasburg will be on the disabled list until at least June 16 with a right lat strain. The Nationals officially placed Stephen Strasburg on the disabled list today and called up left-hander Xavier Cedeno from Class AAA Syracuse to take his roster spot. Cedeno, claimed earlier this season on waivers from the Astros, previously spent a one-day stint with the Nationals.

Cedeno will likely remain with the Nationals as an extra bullpen only until Saturday, when right-hander Ross Ohlendorf is expected to take Strasburg’s spot. The scheduled could change, though, based on the next two days. Inclement weather could lead to postponements, which could allow the National the option to skip Strasburg’s spot.

Strasburg had little to say about his condition or his expectations for a recovery. On Tuesday, he said the lat strain was “going in the right direction.” Wednesday, he tried to throw a bullpen session, but the Nationals canceled it once he still felt soreness in his lat.

“I feel better than I did two days ago,” Strasburg said. “But you have to ask the people who make decisions around here what the strategy is.”