Former U.S. Open champ Gary Woodland just announced some scary news -- he's undergoing surgery to remove a lesion from his brain next month ... though he said he's in good spirits despite it all.
Woodland said on X on Wednesday morning he was actually diagnosed with the ailment a few months ago ... though he had initially tried to treat it with medication.
However, he says after talking it over with docs recently, he's now decided to go under the knife to try to remedy the problem.