Peers started his footballing career at Blackburn Rovers, and later moved to Mansfield Town, where he made 30 total appearances. Peers was signed for Sligo Rovers by Sean Connor following the club's promotion to the Premier Division and played regularly at right-back that year. The following year following the departure of centre-backs Michael McNamara and Liam Burns Peers moved into the centre of defence and has been the rock at the heart of the Sligo defence ever since. Injuries forced Peers to miss much of the 2009 League of Ireland season and his presence was badly missed. He did recover in time to take his place in the team for the 2009 FAI Cup Final, however it would end in disappointment with Sporting Fingal winning 2-1. The following year was much better with Peers playing consistently and Sligo having a fantastic season that saw Peers play in both the FAI Cup and League of Ireland Cup finals. Peers played a major role in the 2010 FAI Cup victory by scoring the winning goal in the 1-0 semi-final win over Bohemian at Dalymount Park. Following the departure of Conor O'Grady at the end of the 2010 season Peers became the club's longest serving player. Rovers repeated the FAI Cup success in 2011 this time beating Shelbourne in the final. Peers had one of his most consistent seasons making a career-best 46 appearances over the season. The next season brought even more success as Rovers won the league title with the centre-back pairing of Peers and Jason McGuinness a major part of the success. 2013 brought FAI Cup glory again but this time the final would be a bittersweet occasion for Peers as he suffered a cruciate knee ligament injury which will keep him out for some time. Despite this he signed a new two-year contract at the end of the season which will keep him at the club for 10 seasons. He has made the 5th most appearances in the history of the club. After 346 appearances in 11 seasons at The Showgrounds, Peers departed for Dublin side St Patrick's Athletic for the 2017 season. His signing was announced by manager Liam Buckley at the club's 2016 Awards Night on 19 November 2016. Peers scored two brilliant diving headers on his Pats debut, scoring the first two goals in a 5–0 pre-season friendly win over Bluebell United at John Hyland Park on 24 January 2017. He made his competitive Pats debut 7 days later as Pats beat Bray Wanderers 4–0 in the Leinster Senior Cup at the Carlisle Grounds, with Peers coming off injured in the 45th minute while 3–0 up at the time. Peers signed for Glentoran of the NIFL Premiership in January 2019.
