The big-hitting American signed with Volvik, known for their coloured products, earlier in the year.
“I do not have a ball deal as we sit here today,” he said. “So I can play with whatever ball I want to.
“My deal was up, and so I’m … ball-free. I’m just going to go back to what I grew up with.”
Watson’s form has slumped in 2017, recording only two top ten finishes on the PGA Tour last season.