You could go with Rick but why not just name him Rick in the first place, ya know?
Famous people named Derrick:
Football players Derrick Brooks, Derrick Thomas, Derrick Ramsey, Derrick Mason, and Derrick Johnson; rapper Derrick Jones (a.k.a. D-Nice); basketball players Derrick Rose, Derrick Coleman, and Derrick Favors.
A derrick is equipment used to help in drilling for oil.