He competed for San Luis Obispo Senior High School and California Polytechnic State University.

In 1975, he turned professional after his sophomore season due to the university's dropping its NCAA Division II golf team.

He won the Byron Nelson Award for lowest average stroke total per round.

In 2009, he won his second Senior British Open title after beating Fred Funk and Mark McNulty in a playoff.

He won a month later in August at the Boeing Classic, where he denied Mark O'Meara his first Champions Tour victory, defeating him by one stroke after making birdie on the final hole.

The marks were set largely due to scoring a career-best 61 in the final round of his 2006 MasterCard Championship at Hualalai win.

The benefitting charity is Le Bonheur Children's Medical Center of Memphis, Tennessee.

Roberts was named Professional co-Athlete of the Year by the Tennessee Sports Hall of Fame in 1995 and 2007.

Roberts wrote Focus: The Name of the Game with fellow PGA Tour golfers Scott Simpson and Larry Mize.