He plays primarily as a Defender. His preferred foot is Left.

His most recent move was a from FK Minija Kretinga to FK Atmosfera Mazeikiai on 2026-03-01.

Throughout the Lithuanian I Lyga 2025, arnas martinkus featured in 18 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.