Brock Lesnar Will Not Face Punishment From the WWE for Failed UFC Drug Tests

Brock Lesnar will NOT be disciplined by the WWE for his UFC 200 drug test failures ... and WILL perform at SummerSlam as planned ... TMZ Sports has learned.

A WWE spokesperson tells us ... only full-time WWE performers are subject to the organization's wellness policy, which prohibits PEDs ... but since Brock isn't a full-time performer, he's essentially exempt.

"WWE’s talent wellness program does not apply to part-time performers such as Brock Lesnar," the spokesperson said.

We confirmed with the WWE that Brock has only performed in 19 matches over the past 3 years (4 in '14, 8 in '15, 7 in '16) ... and that the average full-time WWE superstar wrestles more than 200 matches per year.

One well-connected source broke down the situation like this -- WWE is show business, not a regulated athletic competition ... and the wellness program is only designed to keep the "full-time" performers healthy.