Johnson has been dealing with a lower back issue he categorized as a "little strain" since the beginning of January, and his rehab regimen consists mostly of stretching and some core work.
"It's not a big deal," Johnson said. "I'll be on the mound fairly soon, [I'll] be right back out there. I'm just probably not going to be out there running as much."
Johnson, who admitted that the back issue was "pretty much the nail in the coffin" for him being a potential starter, projects to be in the back of the Orioles' bullpen. He was used increasingly in the ninth inning to end 2011, and he is considered to be a strong candidate to close for the Orioles in 2012.
While there has been a strong undercurrent of rumors surrounding the Orioles' preference to trade Kevin Gregg -- signed last winter as the team's closer -- Johnson's status could change things considerably. Gregg's role, like most of the bullpen, is largely to be determined, and the Orioles will closely monitor Johnson's injury in the first few weeks of camp before making any decisions going forward.
Johnson, who was slated to do some light throwing Sunday, went 6-5 with a 2.67 ERA and nine saves in 69 games last year, converting on his final eight save chances. Gregg went 0-3 with a 4.37 ERA in 63 games last season, converting 22 saves in 29 opportunities. New acquisitions Luis Ayala and Matt Lindstrom also figure to factor into the later innings of the O's bullpen.
Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.