MLS Updates Transfer Windows, Roster Rules for 2026

Major League Soccer announced significant changes to its transfer windows and roster rules for the 2026 season on Thursday, extending the summer period to align with major European leagues and granting clubs greater flexibility in building teams. The updates, effective immediately for roster regulations, aim to synchronize MLS operations with the global market ahead of the league's planned calendar shift in 2027.

The secondary transfer window, which handles summer dealings, will open on July 12 and close on September 2. This marks the first time in nearly two decades, excluding the COVID-adjusted 2020 season, that the deadline extends into September, matching the timelines of top European competitions. Previously, the window ended on August 21 in 2025 and August 14 in 2024, often leaving MLS clubs at a disadvantage. Teams could not replace departing players after the early cutoff, while incoming transfers from abroad faced delays due to mismatched registration periods.

To accommodate the longer summer window, which follows the 2026 World Cup, the primary winter window has been shortened. It will open on January 26 and close on March 26, allowing clubs to finalize rosters before...