Barkley appeared on 97.5 FM The Fanatic Philadelphia on Wednesday and was asked for his thoughts on Tiger's DUI. He's clearly upset with people assuming Tiger has a serious substance abuse issue.
"Even Jack Nicklaus, somebody I really respect, talking about, 'Tiger really needs help.' Well he don't KNOW that. We don't know if Tiger has a drug problem."
Barkley added, "He just had a bad reaction [to prescription medication]. He wasn't out there drinking and driving."
Barkley says the "haters" are "in heaven right now because they get a chance to dump on the guy."
Barkley and Tiger were very close friends before 2009 -- and would regularly hit Vegas together. But Tiger cut him off after his marriage fell apart.