Friday's announcement of St. Paul's soccer stadium plans was one of the final pieces to Minnesota's MLS puzzle. Left unanswered, at least for the time being, is the question of whether Minnesota will join the league in 2017 or 2018. It's important, because if United will join the league in 2017, its first steps toward building an expansion squad will be taken this winter.
When MLS announced Minnesota would join the league, Commissioner Don Garber was intentionally vague about the team's start date, with the stadium plan being a key component of that decision. Atlanta United FC will begin play in 2017, with Los Angeles FC starting in 2018; the Miami franchise, led by David Beckham, likely will kick off even later. It would make sense for Minnesota, the only one of the four expansion sides already playing soccer, to join in 2017, thereby keeping an even number of teams in the league.
Even though the Loons have a team already on the field, joining MLS is not as simple as taking the same players and playing a different schedule. MLS is technically set up as a single central entity, so players coming into the league are allocated to teams via an arcane set of rules. One of these is the "discovery process," in which a team is allowed to list seven non-public claims on players who aren't college players, former MLS players, or U.S. national team stars. These claims can be submitted a year in advance — meaning that 2017 expansion teams would submit their lists this winter.
Interestingly, should an MLS team have a current claim on a United player — striker Christian Ramirez and defender Justin Davis might be the leading candidates — it would be possible that Minnesota would have to let the player go to a new team, or make a trade to keep the player. This may also apply to players with MLS experience, like Kalif Alhassan.
The discovery process is far from the only mechanism for the new expansion teams to acquire players, of course. For one, the league will hold an expansion draft the winter before Minnesota begins play; for another, expansion teams get the first picks in the annual college SuperDraft in January before the season. Scouting of both MLS and college players would need to be a priority for Minnesota next year, as those two areas will form the core of United's first MLS roster.
There are allocation mechanisms beside those, as well — so many that, when NYC FC and Orlando City joined the league last year, they held a meta-draft, in which the two picked which would go first in eight different allocation rankings. It so confused NYC FC coach Jason Kreis that he exclaimed, "I've made a mistake!" while laughing, after he drafted the wrong thing with his second selection. Minnesota will hope to avoid the same confusing mistakes as they begin, even a year in advance, to drive toward MLS.
Socer short takes

• The NWSL announced the league's 10th franchise Tuesday, the Orlando Pride (think Lions, the nickname of MLS side Orlando City FC). It didn't take long for Orlando to start making a splash, either — two days later it traded the No. 1 draft pick and two players for star U.S. striker Alex Morgan. Her husband, Servando Carrasco, plays for Orlando City, and she requested the move shortly after the franchise was announced.