With a track record of bringing through such established stars as Erling Haaland, Dayot Upamecano, Dominik Szoboszlai, Naby Keita, Sadio Mane, Karim Adeyemi, Brenden Aaronson and Benjamin Sesko, Austrian side FC Salzburg’s turnover of talent seems to be endless. The club, who have a partnership under the Red Bull umbrella with German giants RB Leipzig, have made almost €500 million from player exits since 2018-19, according to Transfermarkt. Indeed, over…