Two brands define very different kinds of Formula 1 greatness: Ferrari’s century-long aura and Williams’ era-defining engineering peaks. Only a small group of racers have worn both overalls, carrying lessons from Maranello to Grove (or the other way around), and leaving a neat paper trail through the sport’s biggest moments, for good and ill. Those eight names cover decades, from the DFV years to the turbo boom, the V10 era, and today’s hybrid powertrains.
The shared alumni
The crossover list is shorter than most fans guess, knowing for how long both teams have existed in Formula 1. The earliest driver is Clay Regazzoni, who raced for Ferrari across the early 1970s and then joined Frank Williams outfit for 1979, helping deliver the team’s first Formula 1 victory in its breakthrough season.
Next comes Carlos Reutemann, a front-runner with Ferrari in 1976-78 before becoming a Williams spearhead in 1980-82, where he was able to fight for championships… but without ever reaching glory.
Mario Andretti sits in the category of “cameos”. He appeared for Ferrari in the early 1970s and again in 1982, and he also started a Grand Prix for Williams back in 1982, when the English team had to look for a substitute after the shocking retirement of Carlos Reutemann mid-season.
During the late 1980s and the early 1990s, Formula 1 saw two of the most famous drivers of the era taking the bridge between Williams and Ferrari. Nigel Mansell was the first one. ‘Il Leone’ fought for the World Drivers’ Championship in the mid-80s with Williams, but after a few disappointing defeats, he changed Grove for Maranello. The relationship between the Briton and the Italian team went sour quickly, and in 1991 Mansell returned to Williams, where he won the title in 1992.
In Mansell’s last season at Ferrari, his teammate was Alain Prost. The Frenchman, who was the defending champion, didn’t enjoy great times with Ferrari either. After a controversial press conference in 1991, he was fired and had a sabbatical year in 1992. He came back to Formula 1 in 1993 with Williams, winning his fourth and last championship before retiring.
We almost had to wait 20 years to see another driver changing Maranello for Grove. Rubens Barrichello spent six seasons alongside Michael Schumacher in the most successful era for the Italian team (2000-2005). After a stint in Honda and Brawn, he raced for Williams in his last two seasons as a Formula 1 driver.
His substitute and compatriot followed his steps. Massa raced for Ferrari until 2013, then joined Williams for 2014-2017 in the early turbo-hybrid era, where the Brazilian achieved a pole position and fought for a couple of race victories, without success.
And now there’s Carlos Sainz Jr. The Spaniard, who raced for Ferrari from 2021 to 2024, joined Williams with a multi-year deal in 2025. At the same time, the British team signed a deal with Super Group, bringing his brand Jackpot City Casino to the car. With that backdrop, Sainz’s switch reads less like a sentimental “legacy team” choice and more like a calculated risk—and the results followed: he took third place in Azerbaijan and Qatar in 2025, giving Williams two podiums in the season.
Even if the team has recently had some struggling seasons, ‘Smooth Operator’ featured twice on the rostrum in his first season in the Jackpot City Casino sponsored team.
Why the Ferrari–Williams crossover keeps happening
Ferrari is the only constructor to have contested every Formula 1 world championship season since 1950, and its line-ups are built for immediate title pushes. Williams has gathered its championships in waves, with dominant spells in the 1980s and 1990s. That contrast helps explain the crossover: a Ferrari seat is a summit attempt, while Williams can offer leadership and a clean slate.
Timing matters too. Many of these switches arrived at career crossroads: a veteran chasing one last title shot, a star escaping internal politics, or a race winner choosing certainty and influence over waiting for a top-three vacancy. The names above show the pattern. When the cars align, history follows. When they don’t, the driver still carries hard-won reference points between two very different cultures, from engineers to strategists to mechanics, which is why the link keeps resurfacing whenever the market reshuffles.
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