There really is not ball in ice hockey, but we are big fans and do not want to leave out the sport.  A puck, which is round in two dimensions, is used in place of a ball.  The NCAA controls everything down to the color.

Who said bowling balls were boring?  The NCAA allows for normal wear and tear, but make sure to include a serial number before you roll the first ball.

The National Collegiate Athletic Association (NCAA) rules stipulate color, weight, size and number for the balls to be used in the sport of water polo. In addition, the ball must be waterproof and free of strappings and slippery coverings.

As the the sole competent authority in basketball by the International Olympic Committee (IOC), the International Basketball Federation (FIBA) has a big challenge in setting the rules for 213 National federations of basketball throughout the world.

There are some references to the circumference of an NBA basketball; however, there is nothing about circumference in the rules. NBA only lists the pressure in the rules governing equipment.

From the Official Rules of the Womens National Basketball Association (WNBA) published in 2014, the requirements are fairly simple and straight-forward.

Finally, a sport that has so many similarities between the men’s and women’s rules that they are published together. The NCAA offers rules for both in one publication.

Little League Baseball will not allow anyone to restate their rule regarding baseballs. Maybe that makes it easier for teams to cheat if you have to pay to read the rules. References: Photo – www.derbylittleleague.com

The offense attempts to score runs by hitting a ball thrown by the pitcher with a bat and moving counter-clockwise around a series of four bases: first, second, third, and home plate. A run is scored when a player advances around the bases and returns to home plate.

Billiard Congress of America – World Pool-Billiard Association publishes rules for American-style pool games such as Nine Ball, Eight Ball, Ten Ball, Black Ball and Continuous Pool. The specifications for the balls seem to be consistent among all the games, as long as you play by the American-style rules.