The top flight is MLS, Major League Soccer.
Some acronyms for U.S. Pro Soccer would include the USSF which stands for the United States Soccer Federation and there are also three professional soccer league divisions under the United States Soccer Federation. Division I, the strongest and highest division, is made up of teams from MLS or Major League Soccer. Division II is made up of teams from the NASL or the North American Soccer League. Division III, the weakest and lowest division, is made up of teams from the USL Pro, or United Soccer Leagues Professional Division.
USSF is the United Stated Soccer Federation. This is the national association affiliated with FIFA and which fields the US national team. There is also MLS, which stands for Major League Soccer, and is the foremost league for professional soccer in the United States.
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Pro Direct Soccer sells various soccer related items. Shoes, goalkeeper gloves, uniforms, bags, water bottles, shin pads, Champions League replicas, Europa League replicas, and soccer balls.
the payment monthly for a pro soccer player is 12,550 monthly (average pay) 4500000000000000000000000000000000000000000000006.76 a day
It was founded in 1993.
F.I.F.A
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The MLS is the professional league in the United States and it stands for Major League Soccer.
The Football league in the US is known as Major League Soccer or MLS for short.
By pro I guess you mean MLS which is the first tier of American soccer, in that case it's 15 teams.
David Beckham