2021 Michigan State Spartans Fourth Down Conversion Defense Split Stats through 01/10/2022
| Split | G | Attempts | Conversions | Conversion % |
|---|---|---|---|---|
| All Games | 13 | 37 | 24 | 64.86 |
| at Home | 6 | 21 | 13 | 61.90 |
| on Road/Neutral Site | 7 | 16 | 11 | 68.75 |
| in Wins | 11 | 36 | 23 | 63.89 |
| in Losses | 2 | 1 | 1 | 100.00 |
| vs. Conference | 9 | 23 | 13 | 56.52 |
| vs. Non-Conference | 4 | 14 | 11 | 78.57 |
| vs. Ranked (AP) | 3 | 5 | 3 | 60.00 |
| vs. Unranked (AP) | 10 | 32 | 21 | 65.63 |
| vs. FBS (I-A) | 12 | 33 | 20 | 60.61 |
| vs. FCS (I-AA) | 1 | 4 | 4 | 100.00 |
| vs. FBS Winning | 8 | 22 | 13 | 59.09 |
| vs. FBS Non-Winning | 4 | 11 | 7 | 63.64 |
| vs. FBS Power 5 | 11 | 29 | 18 | 62.07 |
| vs. FBS non-Power 5 | 1 | 4 | 2 | 50.00 |
| in August/September | 4 | 15 | 13 | 86.67 |
| in October | 4 | 11 | 4 | 36.36 |
| in November | 4 | 9 | 5 | 55.56 |
| in December/January | 1 | 2 | 2 | 100.00 |