Dr. Oz Explains Rob Gronkowski's Back Injury

Here's Dr. Oz dumbing down Rob Gronkowski's season-ending back injury, 'cause we know all that medical talk can be confusing sometimes.

Gronk left the Pats v. Jets last Sunday due to a herniated disc ... and now that the team announced that he's having season-ending surgery, Oz explains why the Pro Bowl TE won't be able to contribute to New England's Super Bowl run.

Long story short ... Gronk is in a lot of pain, but Oz believes he should be fine in a few months.