According to the National Hole-In-One Registry, the odds against any Tour player making a hole-in-one on any given par 3 are 3,000/1, which makes the odds against making two holes-in-one in the same round 9,006,000/1. Astronomical though those odds may seem, the feat has actually been achieved twice, by professional players, on the PGA Tour and once on the European Tour.
In fact, the first player in PGA Tour history to record two holes-in-one in the same round was West Hatford amateur Bill Whedon, who did so during the first round of the Insurance City Open at Wethersfield Country Club, Connecticut in 1955. However, the first bona fide ‘professional’ to achieve the odds-defying feat on the PGA Tour was Japan-born Yusaku Miyazata. During the second round of the Reno-Tahoe Open at Montrêux Golf and Country Club, Nevada, in 2006, Miyazato holed his tee shot on the seventh and twelfth holes. In 2015, American professional Brian Harman recorded his first-ever competitive hole-in-one on the third hole at Plainfield Country Club, New Jersey, during the final round of The Barclays and, lo and behold, his second-ever on the fourteenth.
On the European Tour, Australian professional Andrew Dodt started his second round of the 2013 Nordea Masters at Bro Hof Slott Golf Club in Upplands-Bro, Sweden on the back nine, but made an ace at his second hole of the day, the 175-yard eleventh, and another on his sixteenth, the 208-yard seventh. He has the distinction of being the only European Tour player two holes-in-one in the same round.