[4] He also scored his first professional goal in that match, finding the net from inside his own half in the second minute of stoppage time at the end despite Southend United losing 3–2.

[8] On January 14, 2022, with previous manager Steve Evans having left the club, Kelman returned to Gillingham for the remainder of the season.

[9] On July 25, 2022, Kelman signed for League Two club Leyton Orient on a season-long loan deal.

[10] On January 31, 2024, Kelman signed a contract extension with Queens Park Rangers, subsequently joining League One club Wigan Athletic on loan for the remainder of the season.

He spent much of his youth in Texas, including time in the setup of FC Dallas, before moving back to England.