Why the MLS-USL affiliation makes the free-agency issue even more urgent 13 Feb 2015 And it’s at the USL level where the issue of free agency — the divide that separates the union and MLS brass — might be most important. If players can be “parked” in the lower division for the lives of their contracts, including team options, then it’s hard to call USL anything else but a farm system. But, if players who are with MLS teams but don’t get the chance at first-team MLS football are offered the chance to move on, then we can argue that truly, USL is a system that puts the development of the player, first.