Lists leading TCU to four team titles as his biggest thrill in golf. Took up golf seriously at age 10 with the encouragement of his dad and grandfather, who he lists as his heroes. His dad, Joe, is a Lubbock, Texas, obstetrician and gynecologist. He will occasionally caddie for his son.
Has his own website, jjkilleen.com.
Despite living in Texas, remains a huge San Diego Chargers' fan. Compounded his humerus playing freshman football at Francis Parker School. Injury sidelined him from golf for one year. "I just got smoked, and that was the end of my football career."