Cutting it off at 2000 because "if we go farther back you just have Troy Davis" is comical. More like "we're mostly young bucks and don't have a clue what happened before 2000."
QB - Bandhauer at TEX, 1998 (437 pass yds)
RB - Hoppmann vs KSU, 1961 (271 rush yds)
RB - D. Davis at UI, 1998 (244 rush yds)
WR - Lester vs OU, 1989 (203 rec yds)
WR - Doran at OU, 1949 (203 rec yds)
TE - Krepfle at SDSU, 1971 (143 rec yds)
FLEX - Oberg vs OU, 1989 (411 pass yds)
And if I can't use pass yds in Flex, there are 3 easy QBs with 140+ rush yds (Seiler vs NEB, Caldwell at MIZ, Pedersen at OU) and a RB with 150+ rec yds (Jacobs at NEB).