Vijay Singh will try to be the first player to win three straight Buick Open titles.
Singh won the Buick Open in 1997, 2004 and 2005.
British Open champion Tiger Woods yesterday committed to play at next month's event in Grand Blanc. Other new commitments to the PGA event include Brad Faxon, Mark O'Meara, Robert Allenby, Bubba Watson and Justin Leonard.
The Buick Open at Warwick Hills runs Monday through August 6.