Casper served as Ryder Cup captain in 1979, was twice PGA Player of the Year (1966 and 1970), was twice the leading money winner, and won five Vardon Trophy awards for the lowest seasonal scoring average on the Tour.

Respected for his extraordinary putting and short-game skills, Casper was a superior strategist who overcame his distance disadvantages against longer-hitting competitors such as Arnold Palmer and Jack Nicklaus with moxie, creative shot-making, and clever golf-course management abilities.

Never a flashy gallery favorite, Casper developed his self-contained style, relying on solid technique, determination, concentration, and perseverance.

He was not considered one of the "Big Three" — Jack Nicklaus, Arnold Palmer and Gary Player — who is widely credited with popularizing and bringing enormous commercial success to the sport around the world; however, between 1964 and 1970, Casper won 27 tournaments on the PGA Tour, two more than Nicklaus and six more than Palmer and Player combined, during that period.

[9] Casper's 20-year period of winning on the PGA Tour—between 1956 and 1975—was an era of extraordinary growth in tournament purses, television coverage, and depth of competition.

Casper faced legends such as Palmer, Nicklaus, Sam Snead, Cary Middlecoff, Gary Player, and Lee Trevino when they were all at or near their peaks.

[11] Casper was a member of the Church of Jesus Christ of Latter-day Saints, joining in early 1966 at age 34, at the height of his playing career.

[15] After his professional career, Casper was a designer for many golf courses, such as The Highlands, The Palm, and Eagle Crest in Sun City Summerlin, Nevada.

He also designed the Hidden Oaks Golf Course, 9 holes of a beloved Par 3 in a residential neighborhood just north of Santa Barbara, CA.

Casper was active in charitable work for children and hosted fundraisers, including an annual tournament at San Diego Country Club for "Billy's Kids".