Barry Bonds isn't sure if he'll return to the Giants' lineup this season. "I don't know right now when I'm going to come back. And right now, I don't know if I'm going to be back at all this year," the San Francisco slugger told MLB.com on Thursday in a telephone interview. Bonds, who has 703 home runs to rank third on baseball's career list behind Hank Aaron (755) and Babe Ruth (714), returned to his Beverly Hills home in late June to continue rehabilitating his right knee. Bonds, who turns 41 on July 24, first underwent surgery Jan. 31, and has had two more operations since. He hasn't played this season. "He's progressing, but there's not a lot to report," assistant general manager Ned Colletti said before the Giants beat the Dodgers 4-3 Thursday night. "He's showing signs of progress, but there's no timetable for baseball work to start and there's no timetable for a return. He's just slowly getting better."