David Beckham and brothers Jorge and Jose Mas, heads of Coral Gables-based infrastructure company MasTec Inc., want to build a 25,000-seat Major League Soccer stadium plus more than 1.5 million square feet of other new development and parks at the city-owned Melreese golf course in Miami. They are asking the City Commission on Wednesday to put the land lease and proposed project on the November ballot. The deadline for requesting a ballot measure is Aug. 7.