As st8ofmind mentioned, Coach D was not DC at MSU in '98, but rather was the position coach for the DBs. Obviously you've got Mike Tressel, Dick's son/JT's nephew, who is the special teams coordinator and LB coach at MSU but you could also add the following:
# Donny Treadwell is MSU's OC -- played at Miami OH in '79, where JT was his position coach. Treadwell was JT's OC at YSU for several years.
# Dave Warner, MSU's QB coach -- played at Syracuse in '80 & '81, where JT was
his QB coach.
# Mark Staten, one of the MSU line coaches -- was a GA at
OSU for two years under JT.