Diehl was a member of the Pitt raiders in 2277.
Other raiders contemplated asking him or Zubrowski for a card game to relieve their boredom. 
Diehl is mentioned only in the Fallout 3 add-on The Pitt.
- ↑ PittRaiderTalk3: "Maybe I'll talk to Zubrowski or Diehl, get a card game going. Not exactly exciting, but it beats sitting around with our thumbs up our asses, right?"