At first, I was going to pushback here.
I recall Youngblood was exclusively outside in the 4-3 that the Rams played for most of his career.
I believe they switched to the 3-4 in 1983 when Fritz Shurmur came in as DC under John Robinson.
Jim Youngblood was a backup for a couple years but did not see much action behind Andrews, Wilcher and Owens (outside), and Ekern and Collins (inside).
However, I do agree that when Jim Youngblood played those final two seasons, he was going in as a backup inside. Since Reeder was a backup, then maybe we do agree.
I remember in ‘83 thinking the change to a 3-4 was bad for Jack Youngblood who was small for a 4-3 DE. Did not how he could hold up as a 3-4 end. Man was I dead wrong. Jack had two excellent seasons in 1983 and 1984.