What you need to know about the 2018 MLS secondary transfer window

Major League Soccer's secondary transfer window, the second of two periods on the calendar in which teams can register new players via international transfers or intra-league trades, will officially open on Tuesday.

The secondary transfer window, which runs through Aug. 8, will be the last chance for MLS teams to complete incoming transfers and trades for the 2018 season. The primary transfer window was open from February 7 to May 1.

Teams can announce incoming transfers and trades outside of the transfer windows whenever the paperwork is official, but a player cannot officially be put on a club's roster until his International Transfer Certificate (ITC) is transferred, which must happen…