Aaron Ramsey, 16, from Caerphilly, had his seven minutes of glory after being called off the bench against Hull City at Ninian Park last month.
Aaron, a pupil at Ysgol Gyfun Cwm Rhymni in Blackwood, was supported at his debut by 12 of his teachers on the terraces.
"My teachers have always backed my football," he said. "If I don't make it to the Premiership, I'd like to do something on the sidelines of the sport."
The midfielder, who is currently sitting 10 GCSEs, ended John Toshack's record by 113 days. He made his debut with five minutes remaining in the 1-0 home defeat, replacing the current Welsh international winger Paul Parry in front of a crowd of 12,421.
The youngster is one of a handful of young players to be nurtured through Cardiff City's youth academy. At the end of the game, Cardiff City manager Dave Jones spoke highly of Aaron's talent.
"I said before the game that I'd have to dip into the kids and Aaron Ramsey is the best one. The boy has a great future here."
Assistant head Rhys Thomas, said: "Aaron is talented at many sports and is good academically. We have always enjoyed going along and supporting him."
* Wales soccer hero Ryan Giggs has called for Modern Apprenticeships in football, with a recognised NVQ. Manchester United captain Giggs, who was born in Cardiff, said he would like to train talented youngsters in real-life situations while at his team's training complex last month.