The Czech-based team, who have axed Sylvain Guintoli, Jakub Smrz and Maxime Berger, have called time on the season although they publicly remain committed to the 2013 campaign.
McCormick was fifth at the last round in Portimao and the team claimed its maiden WSBK victory via Guintoli at Assen.
Max Biaggi (347 points), British rider Tom Sykes (316.5) and Marco Melandri (308.5) will vie for the title in the season finale.
Even if Sykes takes a double win and 50 points, Biaggi just needs 20 - akin to two sixth places - to take the title.
The Manufacturers’ battle is also at stake with Biaggi's Aprilia leading the way with 422.5 points against Melandri's BMW on 394 and reigning champions Ducati on 375.