[2] He left Bradford to join Yorkshire rivals Hull City, playing in the Third Division, for a nominal fee on 18 June 2001.

[6] Kerr expressed his desire to leave Scarborough in June 2005 to return to the Football League and held talks with Barnet and Lincoln City.

[8] He enjoyed an impressive debut season for Lincoln, under then manager, Keith Alexander, helping them reach their fourth successive play-off spot (albeit an unsuccessful one).

The style of football played under Alexander, however, often undermined Kerr's ability as a midfielder, despite his presence being felt throughout the campaign.

Kerr, as a consequence, formed a solid partnership with Lee Frecklington in the middle of the park for Lincoln, helping them in their promotion push for the fifth successive season.

[18] His 2011–12 season was brought to a premature end after a cruciate ligament was torn following a tackle by Luton midfielder Keith Keane in the FA Trophy semi-final second leg on 17 March 2012.

[28] Having failed to establish himself in the Avenue team, he was loaned out to Conference North rivals Hyde on 17 October 2014 for an initial one-month period.

[29] Kerr joined fellow Conference North side Stalybridge Celtic on a free transfer on 24 November 2014 following his failure to impress during his time with Bradford Park Avenue.

[32] He moved on to join Ossett Albion,[33] debuting in the club's 2–1 Northern Premier League Division One North victory at Droylsden on 30 January 2016.