Major League Baseball has put forth significant proposed alterations to free agency and roster rules as part of its ongoing collective bargaining negotiations with the MLB Players Association. The union swiftly rejected the league's offers, with interim executive director Bruce Meyer stating the proposals were contingent on the players agreeing to a salary cap system that he contends would drastically reduce overall player compensation and diminish player leverage.

The league's proposal includes establishing a three-week free agent signing window from the early December Winter Meetings through December 21, which would then reopen in February. This would be coupled with a ban on trades during the periods when free agency is not open, though teams could still negotiate with players starting five days after the World Series concludes. MLB stated these changes are intended to create a more active offseason transaction period, akin to the NBA and NFL, and would be implemented alongside a salary cap.

"MLB expressly conditioned these proposals on the players’ agreement to a salary cap system, which would drastically reduce overall player compensation, eliminate fully guaranteed contracts through escrow, and turn back the clock on fundamental player rights," Meyer said in comments to ESPN. "Their latest proposals regarding free agency would eliminate player rights by establishing an artificial free agency window, subject to a salary cap, which would reduce player leverage and create a game of musical chairs pitting player vs. player."

Beyond free agency, the league also proposed changes to roster rules and the Rule 5 Draft. The roster changes would require teams to set weekly rosters between Sunday night and Monday afternoon, with players needing to remain on the roster until the following Sunday unless placed on the injured list. Position players placed on the IL would need to stay for one week, while pitchers would need to remain for two weeks. Additionally, the number of minor league options per season would be reduced from five to four.

The proposed changes to the Rule 5 Draft would make players eligible one year earlier, and teams would be permitted to option these players to the minors. Meyer asserted that the league's claims that a salary cap would limit roster turnover were "entirely unserious" and alleged that MLB is "not interested in any changes that don’t directly reduce the rights of all players and shift leverage to the owners."

MLB spokesperson Glen Caplin, however, told the league's website that a cap-and-floor system "would unlock additional opportunities to improve the game for players and fans, creating more stability in rosters, getting the best players to the major leagues more quickly, and accelerating the pace of the offseason." Caplin added that in the current economic system, such changes would be "too harmful to competitive balance and would not be practical."