You have to be drafted out of college or high school sometimes it depends on the sport.
depends on the sport they traced the first professional basketball team back to the 1870s or so
canoeing, seriously, it may be professional but it is not a sport.
2 years ago
Practicing the sport
=Skateboarding became a professional sport in the late 1960's==Hope this helps you =p=
The same reason why any other sport became a professional sport: because people became very talented at it.
Ice Hockey became a professional sport in 1904. The United States formed the first professional league. Canada followed quickly in 1905.