The Formula 1 paddock was rocked Wednesday by the news that Christian Horner, the longtime CEO and team principal of Red Bull Racing, has been fired after a 20-year run that featured many race wins and championships with drivers like Sebastian Vettel and Max Verstappen.

Christian Horner has been fired by Red Bull's Formula 1 team and it only adds to speculation about the future of four-time champion Max Verstappen.

After 20 years at the helm of Red Bull Racing, Christian Horner is out as team principal and CEO, effective Wednesday. The bombshell move comes at a tumultuous time for the Formula One team as it struggles to create a competitive car, sitting fourth in the constructors’ standings largely thanks to Max Verstappen’s performances this season.