| 11.1.2015 | Daytona Test | 01 | #MkXI-004=>AA-004 | Pruett / Hand / Kimball / Karam | Chip Ganassi Racing with Felix Sabates | 4th |
| 11.1.2015 | Daytona Test | 02 | #MkXI-002=>AA-005 | Dixon / Kanaan / Larson / McMurray | Chip Ganassi Racing with Felix Sabates | 5th |
| 11.1.2015 | Daytona Test | 7 | #MkXI-017=>AA-010 | Hartley / Barrichello / Hunter-Reay / Graves / Mayer | Starworks Motorsport | 9th |
| 11.1.2015 | Daytona Test | 50 | #017-206C=>AA-011 | Pace / Defoor / Hinton / Schroeder | Fifty Plus Racing Endures for a Cure/Highway | 19th |
| 11.1.2015 | Daytona Test | 66 | #AA-006 | Gewirtz / Lewis / Kvamme | RG Racing | 12th |
| 25.1.2015 | 24 h Daytona | 01 | #MkXI-004=>AA-004 | Pruett / Hand / Kimball / Karam | Chip Ganassi Racing with Felix Sabates | 23rd |
| 25.1.2015 | 24 h Daytona | 02 | #MkXI-002=>AA-005 | Dixon / Kanaan / Larson / McMurray | Chip Ganassi Racing with Felix Sabates | 1st |
| 25.1.2015 | 24 h Daytona | 7 | #MkXI-017=>AA-010 | Barrichello / Hartley / Hunter-Reay / Graves / Mayer | Starworks Motorsport | 37th |
| 25.1.2015 | 24 h Daytona | 50 | #017-206C=>AA-011 | Pace / Defoor / Hinton / Schroeder / Smith | Fifty Plus Racing Endures for a Cure, Inc. / Highway to Help Race Team | 30th |
| 25.1.2015 | 24 h Daytona | 66 | #AA-006 | Lewis / Gewirtz / Kvamme / Cheng | RG Racing | 24th |
| 21.3.2015 | 12 h Sebring | 01 | #MkXI-004=>AA-004 | Hand / Pruett / Dixon | Chip Ganassi Racing with Felix Sabates | 4th |
| 21.3.2015 | 12 h Sebring | 7 | #MkXI-017=>AA-010 | Mayer / Hartley | Starworks Motorsport | DNS |
| 21.3.2015 | 12 h Sebring | 50 | #017-206C=>AA-011 | Pace / Defoor / Hinton / Schroeder | Fifty Plus Racing | 27th |
| 18.4.2015 | 100 min Long Beach [P/GTLM] | 01 | #MkXI-004=>AA-004 | Pruett / Hand | Chip Ganassi Racing with Felix Sabates | 2nd |
| 18.4.2015 | 100 min Long Beach [P/GTLM] | 7 | #MkXI-017=>AA-010 | | Starworks Motorsport | DNA |
| 3.5.2015 | 2 h Laguna Seca | 01 | #MkXI-004=>AA-004 | Pruett / Hand | Chip Ganassi Racing with Felix Sabates | 23rd |
| 3.5.2015 | 2 h Laguna Seca | 7 | #MkXI-017=>AA-010 | | Starworks Motorsport | DNA |
| 30.5.2015 | 100 min Detroit | 01 | #MkXI-004=>AA-004 | Pruett / Hand | Chip Ganassi Racing with Felix Sabates | 4th |
| 30.5.2015 | 100 min Detroit | 7 | #MkXI-017=>AA-010 | | Starworks Motorsport | DNA |
| 28.6.2015 | 6 h Watkins Glen | 01 | #MkXI-004=>AA-004 | Hand / Pruett | Chip Ganassi Racing with Felix Sabates | 2nd |
| 28.6.2015 | 6 h Watkins Glen | 7 | #MkXI-017=>AA-010 | | Starworks Motorsport | DNA |
| 12.7.2015 | 2 h 40 min Mosport [P/PC/GTLM] | 01 | #MkXI-004=>AA-004 | Pruett / Hand | Chip Ganassi Racing with Felix Sabates | 6th |
| 12.7.2015 | 2 h 40 min Mosport [P/PC/GTLM] | 7 | #MkXI-017=>AA-010 | | Starworks Motorsport | DNA |
| 9.8.2015 | 2 h 40 min Road America | 01 | #MkXI-004=>AA-004 | Hand / Pruett | Chip Ganassi Racing with Felix Sabates | 3rd |
| 9.8.2015 | 2 h 40 min Road America | 7 | #MkXI-017=>AA-010 | | Starworks Motorsport | DNA |
| 19.9.2015 | 2 h 40 min Austin | 01 | #MkXI-004=>AA-004 | Pruett / Hand | Chip Ganassi Racing with Felix Sabates | 1st |
| 19.9.2015 | 2 h 40 min Austin | 7 | #MkXI-017=>AA-010 | | Starworks Motorsport | DNA |
| 3.10.2015 | Petit Le Mans | 01 | #MkXI-004=>AA-004 | Hand / Pruett / Dixon | Chip Ganassi Racing with Felix Sabates | 4th |
| 3.10.2015 | Petit Le Mans | 7 | #MkXI-017=>AA-010 | | Starworks Motorsport | DNA |