The Major League Soccer secondary transfer window is set to open on Tuesday and will run through Aug. 7. Teams will again be able to register new signings starting tomorrow.
Per FIFA regulations, MLS teams are able to request International Transfer Certificates (ITC) from players' former clubs to complete signings, loans and transfer deals. While deals can otherwise be completed outside the transfer windows, receipt of a player's ITC is required in order to add players to official rosters and for those players to be eligible to play in competitive matches.
The opening of the transfer window also means that the trade window within MLS for players will once again open. In accordance with the transfer window, the trade window for players is open until Aug. 8. Trades for non-player assets, including international roster slots, allocation money, allocation order slots and MLS SuperDraft picks, can take place outside the transfer window periods.
The 2019 Roster Freeze Date is Aug. 30, 2019, at which time clubs must submit their final 30-man roster. Rosters cannot be changed from that date through the day after MLS Cup, which will be played Nov. 10.