He has used his initials in such a way that it reads B.A.D with no period after “D”. His full name is Bryson, James Aldrich DeChambeau and he has omitted J from his initials in order to maintain it as B.A.D.
Bryson has tally marks on his yardage book for his seven PGA Tour wins!
Yardage books are very crucial for mastering a golf course. Tour professional caddies are often visiting the golf course a few days before the practice round and make all the crucial notes in the yardage books.
The yardage books contain all the necessary information about the pins, distance, and everything that will aid a golfer on the course and moreover, help the players to understand the contours of the green.