I'm very surprised they did that considering they didn't do it for Test when he died and Test was with the company at one time. Dr.Death wasn't.
"Dr. D" did
some work for the fed, but not much:
He signed with WWF sometime around 1998, and participated in that ridiculous "Brawl for All" competition. I think Bart Gunn was the one to knock him out.
Shortly after - IIRC - Williams also worked a very brief angle partnered with Jim Ross during one of Vince’s several unsuccessful attempts to turn JR heel.
Lance Storm wrote about working a couple of WWE house shows with Williams in 2002, although the good doctor wasn’t even with the company at the time.
Finally, I believe Steve worked a brief stint in OVW training WWF/E developmental talent.