Several sons are serving as caddies for their fathers this week at SentryWorld. But one particular father/son tandem stands out. Last summer, Carson Herron made USGA history by becoming a fourth-generation U.S. Amateur qualifier, joining his father, Tim, a four-time PGA Tour winner, grandfather and great grandfather, both named Carson. The Herrons, in fact, are one of three families to be three-generation U.S. Open qualifiers, joining the Loves (Dru, Davis Love III and Davis Jr.) and Alexanders (Tyson, 1986 U.S. Amateur champion Buddy and Skip). Carson, a rising junior at the University of New Mexico who made it to U.S. Open final qualifying last month, has previously caddied for his 53-year-old dad in PGA Tour Champions events, but this is the first time the 20-year-old has carried the bag for him in a USGA championship. Tim Herron also has the distinction of being one of three golfers to defeat Tiger Woods in a USGA amateur competition. He triumphed over Tiger in the Round of 32 of the 1992 U.S. Amateur at Muirfield Village, 6 and 4.