Major League Soccer in Oklahoma City Represents the stages of the OKC multipurpose stadium Placeholders represent an initial 10,000 seat stadium to accommodate the USL Oklahoma City Energy FC. Stadium expansion beyond 20,000 seat if granted an MLS expansion or relocation franchise... Oklahoma City is ready for an MLS franchise. Recent MSA population estimates 1,408,950 residents with 655,407 in the central city. Oklahoma City currently supports an NBA team (OKC Thunder); they have sold out the 18,203 seat Chesapeake Energy Arena with a streak of 415 consecutive sellouts since 2010. City's NBA arena (above) is due $106 million in upgrades and $9 million in upgrades to the Thunder practice facility approved by voters in recent MAPS 4 penny sales tax initiative. Oklahoma City downtown apartments & condominiums continue to grow with downtown residential units approaching 5,000. Oklahoma City & Tulsa (major metro areas) have approved medical marijuana. State is set to approve Medicaid expansion in the fall.