Jay, who left the Navy after suffering a knee injury, made Mel B cry in Saturday night's launch show following his rendition of A Great Big World and Christina Aguilera's 'Say Something'.
The dad-of-one told the judges that he had taken up singing following his injury and made no mention of his recent attempts at a music career.
However, it has now been revealed that Jay was previously signed to Universal Records and released an album called Play It By Heart.
More recently, Jay even supported 2010 X Factor runner-up Rebecca Ferguson on tour.
in 2012, Jay gave an interview to the Daily Mail in which he explained he injured his knee while training for a Navy rugby match against the RAF.
Then 27, he explained how he took up the guitar and began gigging. He added: "I became addicted to playing and singing."
Jay was spotted by a Universal talent scout following an open mic night in London in 2009.
The singer was the last hopeful to audition in front of Mel, Cheryl Fernandez-Versini, Simon Cowell and Louis Walsh on Saturday night's show.
Telling them how he got into singing, he explained: "I was training one day and went over on my knee. I got sent on sick leave, bought and guitar and started to sing."
Cheryl asked: "So you play the guitar?" He replied: "I'm not very good." Jay then added: "This means everything really. I've got a little girl now..."
Following his audition, Simon told Jay: "Amazing, that is how you do it. The control on your voice, the way you built it was outstanding. I've got a really, really good feeling about you."
Mel added: "The passion and emotion was ridiculously good, I cannot even tell you. And I hate you because you made me cry. I don't cry, simple as that."
When asked why by Simon why he was emotional, Jay fought back tears and replied: "It's been a bit of a journey, you know. It means a lot."
Watch Jay's audition here: