FORT MYERS, Fla. -- The Twins placed left-hander Scott Diamond and right-hander Anthony Swarzak on the 15-day disabled list on Friday, as both pitchers won't be ready for the start of the season.
Diamond, who had a bone chip removed from his elbow in December, pitched in his first game on Tuesday, as he tossed two scoreless innings in a Minor League game against Triple-A Pawtucket. He said he plans on returning to the rotation by April 12 if everything continues to go as planned.
Swarzak, meanwhile, threw his second live bullpen session on Friday and is expected to pitch in a Minor League game sometime next week. There is still no official timetable for Swarzak, who has been out with two broken ribs sustained in a horseplay incident in late January, but he's eligible to return on April 6.
"He hasn't been in a game yet," Twins general manager Terry Ryan said. "There's no sense of worrying about that until he gets in a game. As soon as he gets into a game, we can count days, maybe."
In other injury news, third baseman Trevor Plouffe, who was out with a strained right calf sustained while working out on March 9, returned to action at third base and batted seventh against the Yankees on Friday, going 2-for-3 with a run scored. He played in three Minor League games this week to get ready for his return.
And left-hander Rafael Perez, who is coming off shoulder surgery, threw his second bullpen session this week under the guidance of pitching coach Rick Anderson. He's building his arm strength and his next step will be facing hitters in a live bullpen session.
Rhett Bollinger is a reporter for MLB.com. Read his blog, Bollinger Beat, and follow him on Twitter @RhettBollinger. This story was not subject to the approval of Major League Baseball or its clubs.