10 wonderkids who failed to reach their potential

#6 Keirrison

Keirrison in action for Coritiba in 2014

Brazilian Keirrison is another former Barcelona player and you'll probably find his name on various lists highlighting the worst ever players at the club. However, you can't blame Barca for taking a chance on a player, who scored 21 Brazilian Serie A goals in a season as a 19-year-old.

Barca signed Keirrison in 2009 in a deal potentially worth €14 million. He signed a 5-year contract but was quickly loaned out to Benfica. He failed to impress in Portugal with no goals to his name in seven appearances across all competitions. He got sent back to Barcelona in the middle of the season.

A loan spell in Italy with Fiorentina followed and was more successful there compared to his time in Portugal - he had two goals in ten Serie A games - but it was still far from impressive. As a result, he hasn't been seen in Europe since 2009/10.

In recent years, Keirrison has spent most of the time at his first club Coritiba. The 2017 season ended with relegation for the side-- from a Pep Guardiola signed player to a Brazilian Serie B striker. A big fall from grace for the player, who turned 29 at the start of December.

"Many see in this young player the potential centre-forward for the Brazilian national team at the 2014 World Cup," Barcelona announced when confirming Keirisson's signing eight years ago. To this day, Keirrison doesn't have single Brazil cap to his name.