Joseph William Ralls (born 13 October 1993) is an English professional footballer who plays as a midfielder for Championship club Cardiff City.
After playing at youth level for local teams Aldershot Town and Farnborough, Ralls joined the youth academy at Cardiff City after being spotted by scouts from the club. He made his professional debut for the Bluebirds in August 2011 before joining Yeovil Town on a season-long loan deal for the 2013–14 season to gain experience. On his return to Cardiff, Ralls established himself in the first-team and has made over 200 appearances for the club in all competitions.
Ralls began his career at Aldershot Town, where he played one game for the first-team in an Aldershot Senior Cup tie against Bagshot at the age of just 15 after a number of senior players were rested, before joining Farnborough under-16s. After he was spotted by Cardiff City scouts along with Jordan Carter, a small compensation was paid by Cardiff to sign the two players. He had previously agreed to play in a trial match for Premier League club Fulham, although this was postponed before he joined Cardiff. He also attracted interest from Everton and Notts County. Then Cardiff academy manager Neal Ardley has stated that he had to convince other staff at the club about Ralls after he declared his intention to offer him a contract. Following his departure from the club, Farnborough youth coach Aidan Whelan commented "We realised from when he first joined us that he has a real talent. He was head and shoulders above players at the same age level".