Sandberg started off his footballing career with Ludvika FF, before signing with the Allsvenskan club Örebro SK in 1976.
[1][2] In 1984, he left for Greece where he spent three seasons with On 5 July 1984, Sandberg joined AEK Athens and immediately stood out, not only for his distinctive appearance, but also for his playing style.
[3] An unforgettable highlight of his career was Mavros' goal against Apollon Athens in December 1984, when alongside Sandberg he played a "volleyball" with headers in the opponent's area before scoring.
[6] In the summer of 1987, he left AEK and signed with Olympiacos, but essentially his participation and contribution to the "red and whites" was near to nothing, since he was suffering from injuries.
[8] Sandberg won a total of 13 caps for Sweden and scored three goals, but never appeared in a major international tournament.