The Crew is currently without a GM and head coach in the wake of Gregg Berhalter's appointment as United States manager.
Wayne Rooney's visit to the White House drew attention as he was pictured with President Donald Trump's 12-year-old son Barron.
According to his agent, Parker's salary will be worth $2.4 million over the course of the deal.
FC Cincinnati has acquired defender Kendall Waston from the Vancouver Whitecaps in exchange for up to $825,000 in allocation money.
LAFC has traded former No. 1 draft pick Joao Moutinho to Orlando SC for Libyan defender Mohamed El-Munir.
FC Cincinnati added five players to its roster on Tuesday, with its selections in the 2018 expansion draft, while executing two trades.
Steffen, 23, is expected to cost the Premier League leaders between £7 million and £10 million -- a Crew and league record for a keeper.
The 6-0 vote by the council creates a memorandum of understanding that the city will contribute $50m toward site development and infrastructure.
The former Sweden international was already under contract for 2019 but had long chafed over a deal that paid him just $1.5 million in 2018.
Right now, Atlanta United is on top of MLS. But with an offseason of change ahead, how will the champions replace their most influential characters?
In just its second season since entering MLS as an expansion team, Atlanta United won the championship with a 2-0 victory over Portland on Saturday.
The MLS expansion draft takes place on Tuesday ahead of Cincinnati joining the league, and clubs submitted lists of protected players on Monday.
He has been working part-time for ESPN during international fixture breaks and starts an exclusive contract with the network on Feb. 1.
Sporting Kansas City defender Ike Opara has asked the club to consider any trade offers that come in for the 2017 MLS Defender of the Year.
Zac MacMath, Maxi Urruti and Tesho Akindele were among the notable names swapping teams in Major League Soccer's half-day trade window on Sunday.
After two plus decades of coming within touching distance of glory but falling short, Atlanta has a champion again in the form of Atlanta United.
Jeff Carlisle U.S. soccer correspondent
Michael Parkhurst on the tackle that led to Atlanta's first goal: "We had seen a video, and Brad had even told me before the game that a lot of times when [Ebobisse] checks to the ball he likes to go to his right to play the inside of the left foot. I saw that he was shaping up to do that, so I slid to block the pass. Josef did the rest from there. He does what he always does and put it in the back of the net."
|New York Red Bulls||34||22||5||7||+29||71|
|Atlanta United FC||34||21||6||7||+26||69|
|New York City FC||34||16||8||10||+14||56|
|Columbus Crew SC||34||14||9||11||-2||51|
|New England Revolution||34||10||11||13||-6||41|
|Orlando City SC||34||8||4||22||-31||28|
|Sporting Kansas City||34||18||8||8||+25||62|
|Seattle Sounders FC||34||18||5||11||+15||59|
|Real Salt Lake||34||14||7||13||-3||49|
|Minnesota United FC||34||11||3||20||-22||36|
|San Jose Earthquakes||34||4||9||21||-22||21|