|Full name||Sebastian Małkowski|
|Date of birth||2 March 1987|
|Place of birth||Tczew, Poland|
|Height||1.94 m (6 ft 4 1⁄2 in)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 14:07, 20 May 2019 (UTC)|
In January 2018, Małkowski suffered an anterior cruciate ligament injury. His contract with Frickley Athletic expired in May 2018, and on 19 October after getting fit from his injury, he joined Boston United. Before he signed, he played three matches for Barnsley-based Wombwell Town in September 2018. He played one game for the club again in January 2019.
- "Sebastian Malkowski - First Team - Frickley Athletic FC". www.pitchero.com. Retrieved 2016-02-09.
- Team rallies for injured keeper, wakefieldexpress.co.uk, 12 January 2018
- Boston United sign Polish keeper Malkowski, nonleaguedaily.com, 19 October 2018
- Profile at Wombell Town FC's website, wombwelltownfc.com
- United quartet move on, bostonunited.co.uk, 5 February 2019