His father was a prominent Tucson businessman, banker, and hotel developer (the elder Sarver built the Aztec Inn, the Plaza International Hotel (now an Aloft Hotel) at Speedway and Campbell in Tucson in the early 1970s, built and operated the Tucson area Howard Johnson's locations, and headed American Savings & Loan Ass'n. as its CEO. Jack Sarver died of a heart attack in 1979; Robert Sarver would eventually donate funds to his alma mater, the University of Arizona's heart research center, which in 1998 was renamed the Sarver Heart Center in honor of his father. Sarver attended his first Phoenix Suns game when he was 8 years old after receiving tickets to his first basketball game on his 8th birthday from one of the team's original co-owners, Donald Diamond; this became a key point in his growing basketball and soccer fandom, including later team ownership within said sports.