More than any other professional sport, NBA basketball is a family business. For evidence, look no further than the reigning champion Golden State Warriors.

The father of two-time MVP Stephen Curry, Dell, played in the NBA for 16 seasons as an expert outside shooter. His brother, Seth, plays for the Sacramento Kings. Curry’s backcourt mate Klay Thompson is the son of Mychal Thompson, a former No. 1 draft pick of the Trail Blazers and two-time NBA champion. Warriors guard Brandon Rush has two brothers—JaRon and Kareem—who played in the NBA. Forwards Draymond Green and Andre Iguodala both had brothers play in college. And guard Shaun Livingston’s uncle played pro basketball in Germany.

This web of familial relationships is hardly unique to Golden State. In fact, it exists on every single NBA team, with athletic bloodlines that aren’t just limited to basketball.

The Oklahoma City Thunder, who led Golden State 2-1 in the Western Conference Finals before Tuesday’s Game 4, have a center, Steven Adams, whose sister has two Olympic gold medals in shot put. Nearly everyone in the family of Thunder teammate Kyle Singler is an elite athlete, including his father, Ed, who was a quarterback at Oregon State.

According to a Wall Street Journal analysis of biographical data on every NBA player, 48.8% are related to current or former elite athletes—defined as anyone who has played a sport professionally, in the NCAA or at national-team level. While other leagues feature notable dynasties—the Manning’s of the NFL or the Griffey’s in baseball—only about 17.5% of NFL players and 14.5% of MLB players are related to other elite athletes, based on a similar study.