The following is a partial list of notable players expected to compete in the 2009 U.S. Senior Open.

Chip Beck
John Cook
Ben Crenshaw
Nick Faldo (ENG)
Raymond Floyd
Fred Funk
Jay Haas
Scott Hoch
Hale Irwin
Peter Jacobsen
Tom Kite
Bernhard Langer (GDR)
Sandy Lyle (ENG)
Larry Mize
Larry Nelson
Mark O’Meara
Gary Player (RSA)
Nick Price (RSA)
Loren Roberts
Jeff Sluman
Scott Simpson
Craig Stadler
Curtis Strange
Hal Sutton
Tom Watson
Ian Woosnam (WAL)
Fuzzy Zoeller