FranceIsaac débute le Football Américain chez Pendragons de Bouffémont en 2008.
Il est transféré chez les Cougars au poste de RB après avoir participé aux camps d’été 2010.
A l’issue de la saison 2011, Isaac est placé sur le groupe des WR puis rejoint rapidement l’escouade des RB.
Champion de France Elite en 2015 et 2016.
| Rushing | ||||||
| Saison | Nbr. | Yards | + Long | Moy. | TD | Fumbles |
| 2011 | 15 | 74 | 19 | 4.93 | 1 | – |
| 2012 | 12 | 50 | 25 | 4.17 | – | – |
| 2013 | 3 | 18 | 13 | 6.00 | – | – |
| 2014 | 82 | 533 | 40 | 6.50 | 1 | 3 |
| 2015 | 39 | 122 | 20 | 3.13 | 1 | 2 |
| 2016 | 86 | 426 | 53 | 4.95 | 2 | – |
| 2017 | 57 | 446 | 68 | 7.82 | 4 | – |
| 2018 | 116 | 498 | 38 | 4.29 | 5 | 3 |
| 2019 | 88 | 496 | 52 | 5.64 | 5 | 1 |
| 2020 | 22 | 127 | 19 | 5.77 | – | – |
| 2022 | 14 | 55 | 25 | 3.93 | 1 | – |
| 2023 | 15 | 12 | 5 | 0.80 | – | – |
| Total | 549 | 2857 | 68 | 4.38 | 20 | 9 |
| Receiving | ||||||
| Saison | Nbr. | Yards | + Long | Moy. | TD | Fumbles |
| 2011 | 3 | 5 | 9 | 5.00 | – | – |
| 2012 | 2 | 39 | 33 | 19.50 | – | – |
| 2013 | 1 | -4 | -4 | -4 | – | – |
| 2014 | 33 | 295 | 37 | 8.94 | 1 | – |
| 2015 | 14 | 131 | 27 | 9.36 | – | – |
| 2016 | 10 | 120 | 37 | 12.00 | 1 | – |
| 2017 | 19 | 164 | 18 | 8.63 | – | – |
| 2018 | 14 | 182 | 44 | 13.00 | 2 | – |
| 2019 | 18 | 176 | 29 | 9.78 | 1 | – |
| 2020 | 3 | 43 | 29 | 14.33 | – | – |
| 2022 | 4 | 43 | 15 | 10.75 | – | – |
| 2023 | 2 | 9 | 6 | 4.50 | – | – |
| Total | 109 | 1203 | 44 | 9.31 | 5 | – |
| Defending | |||||||||
| Saison | Tackles | Solos | Ass. | Sack | PD | FF | FR | Int. | TD |
| 2011 | 2 | 2 | – | 0.0 | – | – | – | – | – |
| 2014 | 1 | 1 | – | 0.0 | – | – | – | – | – |
| 2016 | 9 | 8 | 1 | 0.0 | – | – | 1 | – | – |
| 2018 | 3 | 2 | 1 | 0.0 | – | – | 1 | – | – |
| 2019 | 1 | 1 | – | 0.0 | – | – | – | – | – |
| Total | 16 | 14 | 2 | 0.0 | – | – | 2 | – | – |
