Derrick was named the NBDL's Defensive Player of the Year for two consecutive seasons (Austin 2005–06, Columbus 2004–05).

[2] In December 2006, he signed a one-month contract with Brose Baskets of the German Basketball Bundesliga.

In February 2013, Zimmerman moved to Germany and signed with Neckar Riesen Ludwigsburg for the rest of the season.

[4] In January 2014, after a couple months without a club, he signed with Energa Czarni Słupsk of Poland for the rest of the season.

[5] After his playing career, Zimmerman returned to his alma mater, Mississippi State, in 2018, serving two seasons as a graduate assistant and one as director of scouting and analytics.