The Chicago Cubs placed slugger Aramis Ramirez on the 15-day disabled list Friday with a strained left quadriceps muscle and slotted Nomar Garciaparra to take his spot at third base against the Marlins. Ramirez, who is batting .302 with 31 homers and 92 RBI, injured his leg running to first base in the first inning of Wednesday's game against Atlanta. The move was made retroactive to Thursday. Garciaparra, who has been out since Sunday with a sore back, approached manager Dusty Baker on Wednesday and volunteered to play third. The five-time All-Star shortstop hasn't played third base since high school. "When Rammy went down, I went to talk to Dusty," Garciaparra said. "I want to help the team in any way I can. "My back is doing all right and I'm feeling better," he said.