English-born Ghanaian Marcus Samuel Agyei-Tabi Michael who has now changed his name to Marcus Mcguane made his debut for Barcelona B on Saturday.
The 19-year-old stepped out of the dugout to replaced Oriol Busquets in the 74th minute to make his debut for the Catalan club.
Cordoba had taken an early lead and Barca had failed to pull even but the introduction of the attacking midfielder tilted the game in their favour as they levelled and eventually won.
Barca signed the youngster from Arsenal last week and inserted a 25 million pounds release clause into his contract.
By El Akyereko
