The 21-year-old golfer is already challenging - and beating - world class stars such as Rory McIlroy and Tiger Woods, but here are some facts you probably didn't know about the talented young player.
1 Depending on which part of the internet you believe, the name Spieth comes from Middle High German and means either "successful" and "speedy" or "late".
2 Recently started the Jordan Spieth Charitable Trust, which focuses on special needs youth, military families and junior golf. It is inspired by his younger sister Ellie, who has autism.
3 Even world number one Rory McIlroy was impressed by the course-record 63 Spieth produced to win the Australian Open in December. "You could give me another 100 rounds today at the Australian and I wouldn't sniff 63," McIlroy wrote on Twitter.
4 Spieth is an occasional member of the "money games" organised by Phil Mickelson in practice rounds before tournaments.
5 Won the John Deere Classic two weeks before his 20th birthday in 2013, thereby becoming the first teenage winner on the PGA Tour since 1931.
6 Is only the second player after Tiger Woods to have won the US junior amateur championship more than once.
7 Spieth rented two houses at the Masters, one to sleep in and the other to hang out with friends and family.
8 He won two and a half points from his four matches at the Ryder Cup in Gleneagles last year, losing to Graeme McDowell in the first singles match after being three up with nine holes to play.
9 One of his mentors is fellow Texan Ben Crenshaw, who played his final round after 44 consecutive Masters appearances on Friday after Spieth had set a new 36-hole scoring record at Augusta National.
10 As a four-year-old Texas Rangers fan, Spieth attempted to catch a stray ball at a game, lost it in the lights and had his two front teeth knocked out.