Call of Duty: Black Ops 4 is quickly becoming gaming's worst kept secret of 2018, with yet more evidence pointing to its existence emerging this week, albeit in a slightly more unorthodox manner.

A familiar 'IIII' orange logo, which resembles the one that has been used in the Black Ops franchise, was spotted on the baseball cap of NBA superstar James 'The Beard' Harden earlier this week. Sources close to Kotaku later confirmed that this is indeed the official logo for the as-yet unannounced first-person shooter.

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Check it out for yourself below.

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This is the latest in a long line of Black Ops 4-related leaks, as we've already seen a bunch of merchandise pop up on the web from GameStop, not to mention initial reports confirming the game's actual development. 

At this point, we're just waiting for an official word from publisher Activision on the matter, which should come pretty sharpish considering at this rate there won't be anything left to announce.