On Wednesday, Seattle Sounders FC will take the pitch for its first training session.
On Tuesday, the club announced invitations extended to 17 non-contract players: Columbian forward Freddy Montero and 16 members of the old Seattle Sounders USL first division team, including Taylor Graham, Leighton O'Brien, Roger Levesque, Nik Besagno and Danny Jackson.
Thirty-one players are expected to report Wednesday, including eight of the players picked up in the expansion draft and two of the SuperDraft acquisitions.
Expansion pick Peter Vagenas has been given permission to join his new team next week, while Jeff Parke has not signed a contract.
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Third- and fourth-round SuperDraft picks Jared Karkas and Michael Fucito will join the team Feb. 2.
Designated player Freddie Ljungberg also will not practice while continuing rehabilitating from hip surgery.
Practices are not open to the public.