BASEketball
When slacker friends Joe Cooper and Doug Remer are challenged to a pickup basketball game against some jocks, they counter by proposing to play a game they learned called "BASEketball", which combines baseball and basketball. In reality, they are improvising all of the rules, but somehow the sport becomes a hit. A promoter whose name is Ted Densley forms a popular league, but after his death a rival owner named Baxter Cain wants to change the rules to increase profits.