Robert William "Bobby" Unser (born February 20, 1934) is an American former automobile racer. He is the brother of Al Unser, Jerry Unser and Louis Unser, the father of Robby Unser and the uncle of Al Unser Jr. and Johnny Unser. The Unser family has won the Indy 500 a record nine times. He is one of ten drivers to win the Indianapolis 500 three or more times and one of only two (followed by Rick Mears) to have won the 500 in three different decades (1968, 1975, 1981). Bobby has also been a spokesman and advocate of many commercial products.