Red Bull team principal Christian Horner has been fired after 20 years with the team, a team spokesperson told CNN Sports on Wednesday.

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.

Prior to Wednesday, Horner had served as the only team principal Red Bull had ever had since it joined the grid in 2005, earning 124 victories, 107 pole positions, 287 podiums, eight drivers' world championships and six constructors' championships. Horner will be replaced by Laurent Mekies as CEO and team principal.