The incident happened after Thomas missed a partner during the third round of the Sentry Tour of Champions in Hawaii.
“I’m an adult. I’m an old man. There’s absolutely no reason to say anything like that.
“It’s awful. I’m extremely uncomfortable. I’m not who I am … But unfortunately I did it and I have to come to terms with it and I’m very apologetic.
“I deeply apologize to everyone and everyone I have offended, and I will be better for it,”
“As he expressed after his round, we agree that Justin’s comment is unacceptable,” the PGA Tour said in a statement, according to AFP, adding that Thomas was likely to be fined for “indecent professional” conduct.
Entering the final round on Sunday, Thomas is tied for fifth place, four shots behind co-stars Harris English and Ryan Palmer.