#3 Alphonso Davies (Vancouver Whitecaps to FC Bayern, 2019) - €10 million
Undoubtedly the most high-profile player on this list, it is difficult to think of any other MLS player who has made a much quicker impact than Alphonso Davies in Europe.
The Canadian became the first player born in 2000s to play in MLS, making his debut for the Vancouver Whitecaps in 2016. But after impressing for the Whitecaps over the next couple of years, it was pretty evident that the left-back was destined to play for a top side in Europe.
Premier League sides Manchester United, Liverpool and Chelsea were all reportedly scouting the teenager. However, it was Bayern Munich who managed to snap him up in January 2019 for a fee of €10 million.
Since then, the pacey left-back, who can play further up the field, has become an integral part of the team. He has made 96 appearances for the club so far and has already won three Bundesliga titles, two German Cups as well as the Champions League in 2020.
Davies has certainly taken the European game by storm since arriving in Germany. Although he cost €10 million, there's no doubt that Bayern have got him for an absolute bargain, given what he has achieved in a relatively short career so far.
#2 Gonzalo Martinez (Atlanta United to Al-Nassr FC, 2020) - €16.36 million
Gonzalo 'Pity' Martinez became one of MLS' most expensive signings when Atlanta United acquired him from River Plate for €14.5 million in January 2019. But less than two years later, the Argentine became the second most expensive export in MLS history.
Atlanta managed to make a profit of around €2 million after selling the midfielder to Saudi Arabian side Al-Nassr FC. But after Martinez guided the Five Stripes to US Open Cup and Campeones Cup triumphs in 2019, one could argue that the profit could have been even more.
Overall, Martinez contributed 11 goals and 14 assists in 54 appearances for the MLS outfit. Alongside fellow 2019 MLS All-Star Josef Martinez, Pity was part of one of the most successful teams in the club's relatively short history.
Now 27, Martinez is currently in his prime and the midfielder has already earned three caps for the Argentina national team. Martinez will certainly be hoping to earn another big-money move in the future with Europe probably his most preferred destination.
#1 Miguel Almiron (Atlanta United to Newcastle United, 2019) - €24 million
Another Atlanta United player on the list, Miguel Almiron, became the most expensive MLS export in history, when he moved to Newcastle United for a whopping €24 million in 2019. The Paraguyan international is also the third most expensive player in Newcastle's history, behind legendary striker Michael Owen and current Magpies forward Joelinton.
Almiron joined Atlanta from Argentine club Lanus for a reported fee of around €7 million in 2017. The 27-year-old's maiden MLS season was impressive as he registered nine goals and eight assists, leading the Five Stripes to the MLS Cup in 2018. The following season, however, he took his game to another level, bagging 13 goals and 13 assists across all competitions.
Naturally this attracted interest from a host of European clubs and although Atlanta intended to keep him, Newcastle's mammoth offer was too hard to turn down for the MLS outfit.
Almiron has registered 13 goals and five assists in 100 appearances for Newcastle so far. While these numbers are nowhere close to his performances in the MLS, he remains one of Newcastle's best players at the moment. However, with the Magpies set to welcome a new era after their Saudi Arabian takeover, it will be interesting to see what the future holds for Almiron.