At the Masters, driving distance is not measured -- at least shared publicly -- on every hole. When you see the driving distance statistic for the Masters Tournament, that's an average of two drives recorded during the round, akin to what the PGA Tour did for many years (and still technically does, despite ShotLink).
For the Masters Tournament, the driving distance holes are the par-4 fifth and the par-5 15th. That's because these holes are ones where the field is almost certain to hit driver.
So, when you look at the official Masters driving distance statistic, know that it does not account for every tee shot hit during a round.