Al Unser led 66.8 percent of all laps in the 1970 USAC season, a mark that still sets the standard for single-season IndyCar dominance.
Al Unser led 1,527 of 2,287 laps during the 1970 USAC season. His 66.8 percent share still stands as IndyCar’s clearest statistical measure of single-season control. He also won 10 races that year, matching A. J. Foyt’s 1964 record for victories by a champion between 1946 and 2014.
Those numbers give Unser a distinct place in the G. O. A. T. debate. Foyt holds the career wins record, Mario Andretti led more laps over his career, and Scott Dixon sets the modern standard for longevity. Yet nobody on the historical percentage table controlled a season as thoroughly as Unser did in 1970.
The gap behind Unser is enormous
Mario Andretti sits second on the season percentage table after leading 1,142 of 2,083 laps in 1966, a 54.8 percent rate. Michael Andretti is next at 53.8 percent, having led 1,136 of 2,110 laps in 1992.
Unser finished 12 percentage points ahead of Mario Andretti.
That margin matters as much as the record. Schedule differences and changing car designs make exact comparisons across eras impossible, but leading roughly two of every three available laps reflects sustained command, rather than a run driven mainly by late-race execution.
Foyt still owns the broader career case
Foyt won 10 races in 1964 and led 861 of 1,750 laps, a 49.2 percent rate. That peak ranks fifth on the percentage table, behind Unser, both Andrettis and Tony Bettenhausen’s 49.5 percent in 1951.
Foyt’s argument strengthens across a full career. His 67 victories remain the all-time standard, eight ahead of Dixon’s 59 and 15 clear of Mario Andretti’s 52. Foyt also earned 53 poles and led 6,621 laps through the historical record book’s 2008 cutoff.
The distinction is straightforward. Unser has the strongest case for one-season domination, while Foyt’s edge comes from accumulated victories and adaptability across changing machinery and surfaces.
Andretti pairs peak pace with career control
Mario Andretti’s statistical record connects both categories. He won nine races during his 1969 title season, while his 7,595 career laps led put him ahead of Foyt, Michael Andretti at 6,607 and Unser at 5,802.
His pole total also shows the complication of different counting methods. Historical tables list Andretti with 67, while modern combined compilations credit 65 and rank Will Power first with 71.
Andretti offers the strongest combination of qualifying speed, career race control and a dominant season. Even so, Unser’s 1970 campaign tops Andretti’s best year in victories and percentage of laps led.
Dixon shows how modern greatness differs
Dixon leads the combined career table with 436 starts. His 59 wins rank second, and his 677 Indianapolis 500 laps led stand as the event record, ahead of Unser’s 644.
Dixon has one Indianapolis 500 victory, while Unser won four times in 27 starts. Unser shares that victory record with Foyt, Rick Mears and Hélio Castroneves.
Modern parity rewards longevity and repeatable execution differently than the USAC calendar did in 1970. Dixon built his record through durability over 436 starts. Unser’s defining mark is concentrated dominance, with 10 wins and 66.8 percent of the season’s laps led.
A record waiting for its next challenger
No season through the historical table’s 2014 endpoint displaced Unser. Foyt still holds the 67-win career target, Power owns the modern benchmark with 71 poles, and Dixon remains eight victories behind Foyt.
The next challenge has a precise target: a champion must lead more than 1,527 laps or exceed 66.8 percent across a season to claim Unser’s most imposing IndyCar record.
