sentences:  Sirois is the son of former Indy 500 mechanic Earl "Frenchy" Sirois, who worked on the winning cars of Lee Wallard, Sam Hanks, and Jimmy Bryan.Sirois is named after driver Leon Duray.The nickname "Jigger" is in reference to two-time Indy-winning riding mechanic Jigger Johnson (1931, 1937), as well as a nickname given to him by his older sister.