Major League Soccer has declined to adopt this sort of league structure and instead operates as a single-entity league.

And MLS players have filed a lawsuit to end the single-entity league.

In addition, the former single-entity league, centrally owned by the N.B.A., has recently changed to allow individual team ownership.

A team in New York would make Metromedia the third investor operator to own more than one team in the single-entity league.

Major League Soccer and the Women's National Basketball Association are single-entity pro leagues.

While the single-entity league does not have true free agency, the re-entry draft was created to provide an outlet of internal movement for veteran players.

Like the W.N.B.A., it is a single-entity league, which means the league owns all the teams and signs all the players.

Speros specifically cited the inability for him to acquire an entire franchise instead of investing in a single-entity league.

M.L.S., a 10-team, single-entity league that owns all player contracts, has struggled to succeed during its nine-year existence.

M.L.S. is a single-entity league in which each team operator owns a financial stake in the league, not just an individual team.