Date of birth
Republic of Ireland
Defender. Cultured defender Sheehan joined the Hatters on loan from Bradford City in January 2016, becoming Nathan Jones' first signing after taking over as manager.
The Irishman made 20 appearances and captained the team for the final seven matches of 2015-16 after Scott Cuthbert suffered a season-ending injury.
The left-footer can operate at either full-back or in central defence, and has made over 300 appearances in his career so far with the majority coming during two spells with Notts County.
Sheehan also counts Leeds United and Swindon Town among his former employers, as well as loans with Mansfield, Crewe, Oldham and Peterborough United, after starting out at Leicester City.
He signed a permanent deal with the Town in May 2016 and made 41 appearances in his first full season, including his 50th in a Luton shirt in a 0-0 draw at Carlisle.
He has Hatters four goals to his name, including three stunning free-kicks that were all nominated for 2016-17 goal of the season.