McLaren Formula 1 driver Oscar Piastri has officially parted ways with his longtime manager, former racing driver Mark Webber.
The pair announced their mutual decision to end the management agreement following the São Paulo Grand Prix, as reported by Motorsport.com.
The professional relationship between the two Australians began in 2019 and guided Piastri through the junior categories of Formula 3 and Formula 2 before securing his current seat in the premier racing series.
Former Haas team principal Guenther Steiner weighed in on the development during an appearance on The Red Flags Podcast, according to the podcast discussion.
Steiner noted that the separation was not entirely unexpected given that Webber had already significantly reduced his trackside presence throughout the current season.
“I’m actually not too surprised because, as you said, Mark was not around,” Steiner stated during the broadcast.
The former team boss suggested that the dynamic between the driver and his manager began to shift during the latter half of 2025, a period marked by a fading title challenge against teammate Lando Norris.
Steiner speculated that Webber may have become overly involved in the driver’s career affairs during that period of professional tension.
“The second half of the season last year, when Oscar, after he didn’t win the world championship, maybe Mark got a little bit involved too much,” Steiner observed.
Steiner further suggested that the decision for Piastri to manage his own career was a natural progression for a driver who has gained significant experience on the global stage.
“And then at some stage, Oscar said, ‘OK, I’m now more experienced. I want to do this on my own,’” the former principal explained.
Despite the split, Steiner acknowledged the substantial impact Webber had on the younger driver’s trajectory.
“Some of his success is owed to Mark Webber, in my opinion,” Steiner noted.
Piastri currently sits seventh in the drivers’ championship standings with three rounds remaining in the 2026 season.