The 26-year-old centre-back has penned a five-year contract with the UEFA Cup holders after moving from Mexican side Pachuca.
The addition of Mosquera is a boost to Sevilla coach Juande Ramos following the loss of defensive lynchpin and team captain Javi Navarro, who could be sidelined for up to eight weeks with a knee injury.
Copyright (c) PA Sport 2007, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: http://gms.to/writeforgms