Patron and spokesperson for Challenge Cancer Support Network. The Robert Allenby Golf Day has raised more than $9 million since 1992 for children with cancer and blood disorders. Has given more than $500,000 to the cause. He also started the Robert Allenby Bluewater Golf and Fishing Invitational, an annual event to raise funds for kids with cancer and/or special needs in Palm Beach County in Florida.

Has duck headcovers on his woods to publicize the effort.