Last week, brothers Davis and Hanks Massey, aged 9 and 11, respectively, pulled off a feat that borders on the unimaginable for golfers of all ages: They both hit holes-in-one in succession at the Par-3 third at TPC Sawgrass.

The odds of two players in the same group making a hole-in-one have been estimated at 17 million-to-1 by Francis Scheid, a retired Boston University math professor who was commissioned by Golf Digest to calculate hole-in-one odds under various scenarios.