Giacomo Agostini
Giacomo Agostini won fifteen Grand Prix world championships between 1966 and 1975, a record that remains unmatched by any rider in the sport's history to this day, competing primarily for the legendary Italian manufacturer MV Agusta before a late-career move to Yamaha.
Giacomo Agostini began racing in Grand Prix competition in the early 1960s and quickly became the standout rider for the legendary Italian manufacturer MV Agusta, winning his first world championship in the 500cc class in 1966. Over the following decade, he built a record of dominance unmatched before or since, ultimately winning fifteen world titles across the 350cc and 500cc classes.
Agostini's late-career move to Yamaha in the mid-1970s, after over a decade with MV Agusta, produced further championship success and demonstrated his adaptability across different machinery, even as rivals from a new generation began to challenge his dominance. He retired from active competition in 1977, having established a championship record that remains unbroken to this day.
After retiring, Agostini moved into team management, running Grand Prix teams through the 1980s and 1990s and remaining a prominent, widely honoured figure within Italian and international motorsport for decades afterward, frequently appearing as an ambassador for the sport he had once so thoroughly dominated.
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Agostini's fifteen world titles, split between the 350cc and 500cc classes, remain the most won by any rider in Grand Prix motorcycle racing history, a record that has stood for decades despite the sport producing numerous other multiple champions since.
Across the 350cc and 500cc classes combined, Agostini's run of dominance through the late 1960s and into the mid-1970s made him the defining rider of his generation, racing for MV Agusta through the bulk of this period before a notable late move to Yamaha, for whom he also won a further title.
Following his riding career, Agostini moved into team management, running a Grand Prix team through the 1980s and 1990s that fielded riders including Randy Mamola and Eddie Lawson, extending his direct involvement in the sport for decades beyond his own competitive career.
Beyond Grand Prix racing, Agostini competed at the famously dangerous Isle of Man TT road race, winning on multiple occasions during an era when the event still counted toward the world championship — a discipline considerably different from purpose-built circuit racing, and one many modern Grand Prix riders never attempt at all given its serious risk profile.
Long after retiring, Agostini has remained a prominent, widely respected figure at Italian motorsport events, frequently invited as an honoured guest and ambassador figure given his status as the most successful rider the sport has ever produced.