[1] In June 2015 Heckmann signed with German team Brose Bamberg.

[4] On 1 July 2021 he signed with Brose Bamberg of the Basketball Bundesliga (BBL).

[5] On August 26, 2024, he signed with Hamburg Towers of the Basketball Bundesliga.

[6] In 2012, Heckmann played in 2 exhibition games for the German national basketball team.

This biographical article relating to a German basketball figure is a stub.