Swimmer Tricia Duncan is the older sister of Tim Duncan, who professionally played what sport for 19 years
Tim Duncan Timothy Theodore Duncan (born April 25, 1976) is an American retired professional basketball player who played his entire 19-year career with the San Antonio Spurs of the National Basketball Association (NBA). Widely considered to be the greatest power forward of all time, he is a five-time NBA champion, two-time NBA MVP, three-time NBA Finals MVP, NBA All-Star Game MVP and NBA Rookie of the Year. He is also a 15-time NBA All-Star and the only player to be selected to both the All-NBA and All-Defensive Teams in all of his first 13 seasons.
Dave Duncan (baseball) David Edwin Duncan (born September 26, 1945) is an American pitching consultant for the Arizona Diamondbacks of Major League Baseball (MLB). He is also a former professional baseball catcher and pitching coach. He began his MLB playing career in 1964 and played again consecutively from 1967 to 1976 for the Kansas City/Oakland Athletics, Cleveland Indians, and Baltimore Orioles.