Landon Donovan is opening up on what the heck was going on with his hair during UEFA Euro coverage on Monday ... with his old teammate claiming it was all due to a recent transplant.
The U.S. soccer legend had quite a unique look on his head during the Fox broadcast ... with a distinct triangle appearing behind his ear -- leading to a ton of speculation on social media.
During a hilarious text exchange with former LA Galaxy teammate Mike Magee, Donovan provided an explanation for his new cut .