#1 Paul Allen
Net Worth: $15.9 billion
Age: 61
Paul Allen has a stronghold on professional sports in the Pacific Northwest. Allen owns the Seattle Seahawks (NFL), the Portland Trailblazers (NBA), and the Seattle Sounders (MLS).
Allen's Seahawks won their first Super Bowl in 2014.
#2 Stanley Kroenke
Net worth: $5.6 billion
Age: 66
Stanley Kroenke is all over the place when it comes to sports team ownership. Kroenke owns the Denver Nuggets, the Colorado Avalanche, the St. Louis Rams, and Premier League soccer club Arsenal.
#3 (tie) Malcolm Glazer
Net worth: $4.2 billion
Age: 85
Glazer owns not one, but two sports teams. Glazer bought the NFL's Tampa Bay Buccaneers in 1995, and the EPL soccer team Manchester United.
Manchester United went public in August 2012 and became the first sports team to ever be valued at more than $3 billion in January 2013.
#3 (tie) Bernie Eccelstone (and family)
Net Worth: $4.2 billion
Age: 83
Bernie Ecclestone owns 5.3% of Formula One, an elite car racing league in the U.K. Ecclestone turned Formula One into a popular sport across the globe.
Much of his fortune is sitting in trust funds for his daughters Petra and Tamara.
#5 Daryl Katz
Net worth: $3.3 billion
Age: 52
Daryl Katz is the owner of the Edmonton Oilers, an NHL team based in Edmonton, Canada. The Oilers are currently working on a new $600 million stadium.
Katz built his fortune after buying thousands of "distressed drug stores" in Canada in the 90s, and then selling a large portion of the stores for $1 billion.
#6 Jerry Jones
Net worth: $3 billion
Age: 71
Jerry Jones has been the owner of the Dallas Cowboys since 1989. The Cowboys are the most valuable sports team in the United States worth $2.1 billion. After making a fortune in the 1970's in natural gas, Jones bought the cowboys for just $150 million in 1989.
He also owns the Cowboys' stadium.
#7 Robert Kraft
Net worth: $2.9 billion
Age: 72
Robert Kraft bought the New England Patriots in 1995 for $172 million.
Kraft is also the Chairman and CEO of The Kraft Group, which owns real estate, paper companies, and the New England Revolution.
#8 Mark Cuban
Net worth: $2.6 billion
Age: 55
Mark Cuban is the owner of the Dallas Mavericks.
Cuban made his fortune in 1999 when he and his business partner Todd Wagner sold Broadcast.com for $5.7 billion to Yahoo!.
#9 Stephen Bisciotti
Net worth: $2.2 billion
Age: 53
Stephen Bisciotti owns the Baltimore Ravens, he bought controlling interest of the football team in 2004. Bisciotti made his fortune founding an engineering staffing firm called Aerotek, now called Allegis Group.
#10 Robert McNair
Net worth: $2 billion
Age: 77
Robert McNair is responsible for bringing the NFL back to Houston. McNair brought the Texans to Houston in 2002. The Texans are worth $1.3 billion.
McNair sold Cogen Technologies to Enron for $1.5 billion just before the tech bubble.
#11 Arthur Blank
Net worth: $1.8 billion
Age: 71
Arthur Blank is the founder of Home Depot. Blank also owns the Atlanta Falcons.
#12 Jim Irsay
Net worth: $1.6 billion
Age: 54
Jim Irsay owns the Indianapolis Colts.
Irsay is known for purchasing Jack Kerouac's "On the Road," original manuscript in 2001 for $2.4 million.