Ovelar, born January the 6th in 2004, scored the opening goal for Paraguayan top-flight team Cerro Porteno in their Superclasico against arch-rivals Olimpia.
The historic derby goal came a week after he made his senior debut for the 32-time Primera División champions.
Nestor Camacho, who scored Olimpia's equaliser in the 2-2 draw, is 31 - more than double Ovelar's age.
The game ended in dramatic fashion - Marcos Acosta putting Cerro in the lead with a 95th-minute penalty and Jorge Ortega equalising with a penalty of his own in the 103rd minute.
This after both teams had a player sent off in a fiery derby encounter that saw Olympia maintain their seven-point lead at the summit of the table.
Ovelar is officially the youngest player to have featured in Paraguay's top division.
What were you doing when you were 14?— FIFA.com (@FIFAcom) November 5, 2018
⚽️ Playing with your friends?
???? Spending your time on video games?
???? Scoring in your country's biggest derby?
Unless you're Fernando Ovelar of ????????Paraguay's Cerro Porteno, chances are you didn't choose the last one... ???????? https://t.co/dC7mXCZPti