Now that Tyrone Mears is a permanent resident of the USA (holds a green card) the Seattle Sounders have two international spots open. The club also has roster space for two signings of any kind, as well as space for another Designated Player.
Today's announcement means that the following players are considered internationals - Oalex Anderson, Oniel Fisher, Erik Friberg, Andreas Ivanschitz, Joevin Jones, Román Torres and Nelson Haedo Valdez.
On May 11th the primary transfer window closes. The secondary transfer window is open on July 4th and closes on August 3rd. Seattle can also sign players that were available on a free outside of those windows, as long as the player was available on a free when the window was open.
If necessary another roster spot could be opened if they place Torres on the injured list, but he is expected back in May.