Team igniter Brian Roberts has been idled, the result of another concussion. He's been prescribed rest, but it isn't known when he'll be able to return. Free-agent pickup Derek Lee, who was supposed to be the veteran presence they needed, has wrist and thumb problems in spring and is now sidelined with the ever-annoying oblique injury. Cesar Izturis recently had elbow surgery. And J.J. Hardy earlier was out with his own oblique injury, making the infield nothing short of a disaster area. Starting pitcher Brian Matusz, who is much-needed, will make his season debut Wednesday night. Meanwhile, Justin Duchscherer is still out with a hip issue.