Date of birth: 29/03/94
Rovers beat a host of other clubs to the signature of Jack O'Connell in the summer of 2011-12 and in his first season with the club he certainly didn't disappoint.
A strong, commanding, left-footed centre-half, Jack went on to make 35 appearances for the Academy and Reserves sides in an outstanding first year that saw him play a key role as Rovers reached the final of both the FA Youth Cup and the Academy League.
The following season Jack gained vital league experience as he spent time on loan with League Two sides Rotherham United and York City.
In 2013-14 the young defender joined Rochdale on loan. Initially it was until the turn of the year, but impressive displays at the back saw the defender spend the full season at Spotland as Dale clinched promotion from League Two, making 45 appearances.
Jack, who has also been capped for England up to Under-19 level, signed a new two-year deal with Rovers in the summer of 2014 before rejoining Rochdale until January 2015.