Jorge Mendes, the Portuguese agent who has conducted many of the biggest transfers in European football, is serially involved in the third‑party ownership of players in apparent breach of Fifa regulations.

Смущает вторая половина предложения.
third party ownership - владение третьей стороной
Вовлечен во владение третьей стороной?

Буду очень благодарна за помощь!