Maholm, who had left elbow issues in September with Atlanta, said he's healthy and expects to throw a bullpen session on Thursday, which still would leave him a few days behind the rest of the starting rotation. He was making throws during pickoff drills.
Maholm was signed when camp opened as fifth-starter insurance for Beckett, who is coming off career-threatening thoracic outlet syndrome surgery. However, Beckett continues to impress and said he considered facing hitters a milestone in his comeback.
"I was a little nervous going in," he said. "Mentally, this was a big hurdle today, more than people think. [It's big] each time I get out there and get over a mental hurdle. I felt really good today. I'm excited."
Beckett was greeted as he came off the mound by Dodgers legend Sandy Koufax, who has worked with Beckett for more than a decade.
"I was standing there with Haren, we were a few feet from Sandy, and I said, 'Did you ever think we'd be pitching and standing here with Sandy Koufax?' And he said, 'There should be a unicorn out here.'"
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.