No, but he did own the USFL's New Jersey Generals.
Each league (little league, high school, college) has its own limits as far as how many players can be on a team. In Major League Baseball, there are 25 players on a team.
Linda Alvarado was the first Hispanic American to own a MLB team. That team was the Colorado Rockies.
George W Bush. He did own a pro team later.
Every Rugby League team have their own stadiums.
MLB teams wash their own uniforms in on sight washing machines.
The oldest American sport that has it's own major league is Lacrosse. The league, Major League Lacrosse was founded in 1999. The sport itself was played as far back as the 12th century by the Iroquois Nations.
1921--An agreement was signed which allowed a Major League team to own Minor League teams. Branch Rickey of the St. Louis Cardinals used this to establish the farm system, controlling players at different classifications of Minor League Baseball and developing them for his team. More info at http://www.minorleaguebaseball.com
Rockford PeachersThe movie "A League of their own" was about the Rockford Peaches, a team that played in the AAGPL. (All American Girls Professional Baseball League)
She was an investor in the group that successfully won the bid to own the expansion franchise Colorado Rockies in 1993. She actually did this 1983, not 1993.
Every single team in the League.
The Racine Belles