The French champions have paid Mexican side Cruz Azul 7.25million euros for 26-year-old Argentina forward Delgado, who has penned a three-and-a-half-year deal.
Crosas, 20, moves to the Stade Gerland from Spanish giants Barcelona on a six-month loan deal.
Copyright (c) PA Sport 2008, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: https://www.givemesport.com/writeforgms