Fantasy owners always have to worry about injuries, but there is nothing worse than seeing the ace of your staff get dinged up and ultimately shelfed. Let's take a look and a few fantasy aces that owners are going to have to live without, at least for now:

JAKE PEAVY (SD)
Peavy will go on the 15-day disabled list with swelling and a strained muscle in his pitching elbow. An MRI exam showed no ligament damage. While disappointed in being shut down for at least two weeks, the Padres ace said he was relieved there's no structural damage. "When you do get discomfort in your elbow and it's near the Tommy John ligament, you know what Tommy John means, and yeah there's cause for concern," Peavy said. He was referring to Tommy John surgery, or reconstructive surgery when a pitcher damages his ulnar collateral ligament...MORE

JOHN SMOLTZ (ATL)
Orginally expected to return by the end of May, John Smoltz could now be out for much longer after experiencing disomfort in his shoulder after a throwing seesion. "It could be anywhere between the [late May] timetable I discussed and a lot longer," said Smoltz, 41, who reported discomfort following his Thursday and Saturday bullpen sessions. He said he doesn't know yet whether he can pitch in games until the situation improves — or when it will improve...MORE

ROY OSWALT (HOU)
Roy Oswalt threw 25-30 pitches on flat ground Monday and said later he felt confident he would make his scheduled start Thursday against the Phillies.  After he was examined by team medical director Dr. David Lintner later that evening, the club confirmed the right-hander would indeed remain in the rotation...MORE

PEDRO MARTINEZ (NYM)
Pedro Martinez may be on the fast track back into the Mets' starting rotation, but he is traveling that road with a heavy heart. After facing minor leaguers in game competition Monday at Tradition Field, Martinez was equal parts enthusiasm and concern in an extended interview. He was zealous about a proposed start for the club that could come before the end of the month. He was distressed about his ailing father and said a desire to be there for his family might bring him to an early retirement - possibly even after this season...MORE

FELIX HERNANDEZ (SEA)
He left his start Sunday after six innings because he felt tightness in his calf. Hernandez said after the game he didn't expect the tightness would cost him a start. Manager John McLaren agreed. "I don't think so," McLaren said when asked if Hernandez might miss a start. "You know him, he wanted to stay out there. I knew he was going to fight me on it, but I was going to have to win this battle. Like I said, he means too much for us. We don't think it's serious, but it's something that if he altered his pitching delivery or something, he might do something to himself. We'll monitor this day by day, and hopefully with a little treatment, a little rest, he's going to be fine. We'll know something more Tuesday." ...MORE