Season-final Elo for all four rated units. These are the opponent-strength values every player performance against Northern Ill. is judged with.
| Season | Rush Offense | Pass Offense | Rush Defense | Pass Defense |
|---|---|---|---|---|
| 2025 | 1388 | 1004 | 1234 | 1326 |
| 2024 | 1384 | 1096 | 1300 | 1325 |
| 2023 | 1370 | 1152 | 1214 | 1274 |
| 2022 | 1356 | 1134 | 1148 | 1148 |
| 2021 | 1352 | 1170 | 1149 | 1186 |
| 2020 | 1219 | 1194 | 1259 | 1190 |
| 2019 | 1270 | 1194 | 1308 | 1220 |
| 2018 | 1324 | 1140 | 1401 | 1232 |
| 2017 | 1377 | 1205 | 1316 | 1270 |
| 2016 | 1416 | 1226 | 1233 | 1252 |
| 2015 | 1384 | 1240 | 1254 | 1270 |
| 2014 | 1466 | 1240 | 1250 | 1226 |
| 2013 | 1473 | 1262 | 1274 | 1238 |
| 2012 | 1444 | 1268 | 1301 | 1258 |
| 2011 | 1413 | 1245 | 1258 | 1238 |
| 2010 | 1382 | 1195 | 1276 | 1269 |
| 2009 | 1316 | 1160 | 1234 | 1250 |
| 2008 | 1308 | 1164 | 1240 | 1258 |
| 2007 | 1314 | 1218 | 1203 | 1194 |
| 2006 | 1326 | 1232 | 1254 | 1206 |
| 2005 | 1350 | 1242 | 1231 | 1240 |
| 2004 | 1348 | 1236 | 1219 | 1194 |
| 2003 | 1304 | 1246 | 1258 | 1196 |
| 2002 | 1300 | 1222 | 1248 | 1197 |
| 2001 | 1252 | 1222 | 1219 | 1214 |
| 2000 | 1282 | 1228 | 1228 | 1235 |