GRAND BLANC TOWNSHIP, Mich. (AP) — Buick Open organizers say David Duval, Billy Mayfair and Boo Weekley have committed to play in the tournament that opens Monday.

The tournament also said Wednesday that Stuart Appleby, Chad Campbell, Andres Romero, Rory Sabbatini and Nick Watney also have joined the field.

The Buick Open runs through Aug. 2 at Warwick Hills Golf & Country Club about 10 miles southeast of Flint.

Earlier commitments came from U.S. Open champion Lucas Glover and past Buick Open winners Justin Leonard, Jim Furyk, Scott Verplank, Tom Pernice Jr. and Brad Faxon.