MLS Is Chasing the Same Aging Stars Liga MX Just Cut

Major League Soccer opened a tampering investigation into Inter Miami this week, just days after the club signed Casemiro away from a rival with a stronger legal claim to him. LA Galaxy held discovery priority on the Brazilian midfielder. Inter Miami signed him anyway.

The fight is the first crack in MLS’s biggest recruiting summer yet, and it looks a lot like the setup that just sank Liga MX’s own star experiment. Mexico’s top flight spent two years importing the same kind of aging, decorated names now landing in the United States. That project lasted barely a season before it emptied out.

A Tampering Claim Follows Casemiro to Miami

Casemiro left Manchester United after a season in which he scored nine goals and helped the club secure Champions League qualification, based on reporting from Goal.com. He wanted Florida. He got a delay instead.

Under MLS rules, a club can hold up to five players on a Discovery List, giving it first rights to sign them, according to ESPN’s reporting on the dispute. LA Galaxy had Casemiro on its list first. Inter Miami had to buy their way past that claim before he could sign at all.

If a club wants to sign a player on the Discovery List of another club that has higher Discovery priority on the player, it may offer that club $50,000 in General Allocation Money in exchange for the right to sign the player.

That is the actual league rule, cited by ESPN from MLS’s own regulations. The club holding priority then gets five days, or three during the secondary window, to take the money or make a serious counteroffer. Inter Miami and Galaxy eventually reached a settlement, clearing the way for MLS’s own roster construction rules to let the deal close. Casemiro’s contract runs through the end of the 2027 season, with an option through June 2029.

The league’s tampering probe has not gone away, even after the clubs settled. It is not Inter Miami’s first brush with discipline over how it builds a roster. In 2021, the league fined the club a record $2 million over its handling of Blaise Matuidi’s signing, docked it more than $2.27 million in allocation money, and separately fined managing owner Jorge Mas $250,000, according to Goal.com.

Lewandowski and Griezmann Headline a Loaded Summer

Robert Lewandowski, 37, joined Chicago Fire as a free agent on a two-year deal after his Barcelona contract expired, the club’s own announcement confirmed. He arrives with 629 goals and 159 assists across 869 professional games and 33 trophies, including ten Bundesliga titles and a Champions League.

Chicago Fire head coach Gregg Berhalter, who managed the United States at the 2022 World Cup, said the pursuit stretched back a year and a half. “It first came into the picture probably in January of 2025,” he told ESPN, “and then here we are, June of 2026, and we’re finally making the signing.”

Antoine Griezmann left Atlético Madrid for Orlando City on a free transfer after years of publicly wanting an MLS move, and scored in his first friendly for the club. Casemiro left Manchester United on the same kind of expired deal. All three add to a group that already included Lionel Messi, Luis Suárez, Heung-min Son, Marco Reus, Thomas Müller and Rodrigo De Paul.

Chicago sat third in the Eastern Conference with 26 points when the league paused for the 2026 World Cup, per the club’s own release. The timing matters less than the pattern: MLS keeps landing players who spent their peak years somewhere else. That is the same commissioner’s office now leaning on the tournament for a bigger bet, a strategy detailed in Don Garber’s plan to convert World Cup viewers into MLS fans. The league’s pull now extends beyond designated players too; New England Revolution have been exploring a deal to bring winger Jack Harrison back to MLS, a smaller but telling sign of the league’s growing gravity.

The League That Tried This First

Liga MX ran this exact play first. In 2025, the Mexican league brought in Sergio Ramos, James Rodríguez and Keylor Navas within months of each other, a stretch widely described at the time as one of its most impressive transfer windows in years. A year later, most of that roster is gone.

• Sergio Ramos left Monterrey in December 2025 and was still searching for a club two months later, linked with Marseille and floated as an option for Wrexham.
• Sergio Canales departed Rayados de Monterrey after the Clausura 2026 season.
• Ángel Correa helped Tigres reach the Apertura 2025 final and the Concacaf Champions Cup final, then stopped training with teammates, with his next move undecided.
• André-Pierre Gignac saw his Tigres contract expire without a renewal offer.
• James Rodríguez left León for Minnesota United, then exited MLS after roughly three months.

Liga MX has cycled through marquee imports for decades, from Ronaldinho and Pep Guardiola to Dani Alves and Gignac himself, long before this latest wave. What changed this time is the speed of the unwind. Heading into the Apertura 2026, the league’s only notable new arrival is Colombian goalkeeper David Ospina, formerly of Arsenal and Napoli, leaving Keylor Navas, Lucas Ocampos and Toluca forward Paulinho as the closest thing left to marquee names.

Not every Liga MX export has been a fading veteran. Young forward Julián Quiñones, still under contract at Club América into 2029, has drawn transfer interest from Aston Villa, a reminder that the league’s pipeline to Europe runs both directions even as its imported stars head for the exits.

How Do MLS’s Discovery Rights Actually Cause Fights?

MLS’s Discovery List system lets any club flag up to five unsigned players worldwide and hold first rights to sign them; if a rival club wants that player instead, it can pay $50,000 in allocation money to buy those rights away, or the original club can make its own offer within days.

The mechanism dates back to the league’s Designated Player rule, created almost two decades ago to let David Beckham join the LA Galaxy outside normal salary budget limits. It was built to let one team chase a star without blowing up competitive balance. It was not built for a summer when six or seven clubs are chasing stars at once.

This is not the first time it has produced a public fight. Discovery rights disputes have flared before over lower-profile targets, forcing clubs to escalate to the league office to settle who gets first crack at a player. The Casemiro case is the highest-profile version yet, precisely because the player in question is a Champions League winner rather than a depth signing.

MLS Has One Advantage Liga MX Never Had

Liga MX’s star era ran on informal recruitment, big personal offers, and no salary mechanism built for retention once a player’s novelty faded. MLS has run its Designated Player system since Beckham, giving it more infrastructure, and more institutional memory, for managing star turnover than Liga MX ever built.

That is the case for MLS being different this time. The case against it is what just happened with Casemiro: even with two decades of rules in place, the league still needed a tampering investigation and a $50,000 buyout to get one 34-year-old free agent onto a roster. Rules built for one star at a time are now handling a roster’s worth of them simultaneously.

Lewandowski is 37. Griezmann and Casemiro are both well past the age clubs typically pay transfer fees for. The same was true of Ramos, Gignac and Correa when Liga MX signed them. None of that guaranteed longevity in Mexico. It does not guarantee it in Florida, Chicago or Orlando either.

A Thinner Apertura Begins

Liga MX opens its Apertura 2026 season with Ospina as its only real new arrival and a star sheet reduced to Navas, Ocampos and Paulinho. MLS opens its stretch run with Casemiro still waiting on the outcome of a league tampering probe before he takes the field for Inter Miami. Both leagues are finding out, on different timelines, what a roster full of aging free transfers actually costs to run.