Assistant Robin Fraser has also been removed from the technical staff page of the club's site.
The always reliable Taylor Twellman has since confirmed Martinez's report:
The New York Red Bulls have fired head coach Mike Petke, per Kristian Dyer of Metro New York:
According to Dyer, sporting director Ali Curtis sacked Petke after a meeting at Red Bull Arena. Goal.com's Ives Galarcep believes that the club's reasoning was due to a disagreement between management and the coach:
Regardless, the move still comes as a surprise. Petke claimed the Supporters' Shield in 2013, which is the only trophy the club has won since the rebrand.
He also helped guide the Red Bulls to the Eastern Conference finals this year. They lost to the New England Revolution 4-3 on aggregate.
As Sirius XM's Nicolino DiBenedetto points out, it's safe to assume that commissioner Don Garber didn't picture this debacle when he approved the formation of another New York club.
There have been reports of Red Bull wanting to sell the team, but Garber immediately rejected those claims in October, via MLSSoccer.com.
It will be hard to replace a man of Petke's qualities. He was clearly beloved by the supporters, especially after the success he's had as both a player and coach.