Here's an example of Woody's pair and a spare; Ohio State 1974:
The pair:
Archie Griffin* RB 256 Att, 1695 Yds, 6.6 Avg
Pete Johnson* RB 80 Att, 320 Yds, 4.0 Avg
The spare:
Champ Henson RB 88 Att, 433 Yds, 4.9 Avg
All the other running backs on the roster (you know, for depth):
Ray Griffin RB 43 Att, 223 Yds, 5.2 Avg
Woodrow Roach RB 16 Att, 81 Yds, 5.1 Avg
Lenny Willis RB 11 Att, 146 Yds, 13.3 Avg
Bob Robertson RB 6 Att, 13 Yds, 2.2 Avg
Louis Williott RB 5 Att, 11 Yds, 2.2 Avg
Jeff Logan RB 1 Att, 3 Yds, 3.0 Avg
Dave Mazeroski RB 1 Att, 5 Yds, 5.0 Avg
And just so it doesn't look like I'm cherry picking, here's 1955:
The pair:
James Roseboro* RB 152 Att, 712 Yds, 4.7 Avg
Don Clark* RB 139 Att, 797 Yds, 5.7 Avg
The spare:
Galen Cisco* RB 64 Att, 438 Yds, 6.8 Avg
And all the other RBs in the room:
Don Sutherin RB 35 Att, 104 Yds, 3.0 Avg
Dick LeBeau RB 7 Att, 3 Yds, 0.4 Avg
Hubert Bobo RB 4 Att, 4 Yds, 1.0 Avg
Don Vicic RB 21 Att, 92 Yds, 4.4 Avg
Joe Cannavino RB 8 Att, 20 Yds, 2.5 Avg
Philip Robinson RB 4 Att, 23 Yds, 5.8 Avg