Shetemi Ayetigbo was playing in a league match for Belvedere Football Club when he collapsed at the St Kevin's Boys Football ground in Santry.
Belvedere FC said everyone is still coming to terms with what happened, as tributes to the teenager poured in on social media.
A statement by the club said: “[We are] mourning the death of one of our U16 players who tragically collapsed while playing for the club.”
“While all of our members are in deep shock, our thoughts and prayers are with his family at this tragic time.”
Belvedere Football Club
“We ask that the privacy of the family be respected as the club supports them in grieving their boy. The club will also support our U16 players, coaches and parents who are devastated at the loss of a very popular team-mate.”
