ProStars was a Saturday morning cartoon show produced by DiC on NBC in 1991.
Originally intended to air on ESPN, the show centers on Michael Jordan, Bo Jackson and Wayne Gretzky fighting crime and helping children, often protecting the environment as well. These three were chosen to represent the pinnacle of all four major American professional sports in the early 1990s. While Jordan and Gretzky are widely considered to be the best to ever play their respective sports, it is accepted that Jackson was included since he could represent both football and baseball and was a high-profile celebrity off the field as well. A reference to his highly popular "Bo Knows" Nike ad-campaign was worked into almost every episode. Bo Jackson was a star player, but not analogous to Gretzky or Jordan.
The stars appear in live action sequences before the show, and often answer questions from kids at the conclusion. Normally this is done solely by Gretzky and Jackson—often in separate sound stages and edited to appear as if talking to each other. Jordan's filmed bits are almost always one line or two, and not part of the skits before the episode. However, none of the celebrities provided their own voices for the animated segments of ProStars.
The ProStars franchise also included a licensed breakfast cereal. (Source: http://en.wikipedia.org/wiki/Prostars)