Craig Stadler, Nick Price and two-time champion Allen Doyle have withdrawn from next week's U.S. Senior Open at Omaha Country Club.
The U.S. Golf Association announced Wednesday that Stadler, who won the Champions Tour's Encompass Championship last month, pulled out because of a foot injury.
Price, who tied for ninth in the 2011 Senior Open in his only appearance in the event, is out because of an elbow injury.
Doyle, who won consecutive Senior Open championships in 2005 and 2006, has an undisclosed medical condition.
The three vacancies in the field will be filled by sectional qualifiers.