May 11, 2016; Las Vegas, NV, USA; General view of Oakland Raiders helmet and NFL Wilson Duke football at the "Welcome to Fabulous Las Vegas" sign on the Las Vegas strip on Las Vegas Blvd. Raiders owner Mark Davis (not pictured) has pledged $500 million toward building a 65,000-seat domed stadium in Las Vegas at a total cost of $1.4 billion. NFL commissioner Roger Goodell (not pictured) said Davis can explore his options in Las Vegas but would require 24 of 32 owners to approve the move. Mandatory Credit: Kirby Lee-USA TODAY Sports