| 1 | Allied Building Products GP of St. Pete-1 | 3/28/15 | Streets of St. Petersburg | 3 | 2 |
| 2 | Allied Building Products GP of St. Pete-2 | 3/29/15 | Streets of St. Petersburg | 4 | 4 |
| 3 | Mazda GP of Louisiana | 4/12/15 | NOLA Motorsports Park | 2 | 1 |
| 4 | Mazda GP of Alabama-1 | 4/25/15 | Barber Motorsports Park | 3 | 3 |
| 5 | Mazda GP of Alabama-2 | 4/26/15 | Barber Motorsports Park | 3 | 2 |
| 6 | NOLA Motorsports Park-2 (makeup) | 5/7/15 | Indianapolis Motor Speedway Road Course | 3 | 4 |
| 7 | Cooper Tires Pro Mazda GP of Indianapolis-1 | 5/8/15 | Indianapolis Motor Speedway Road Course | 2 | 3 |
| 8 | Cooper Tires Pro Mazda GP of Indianapolis-2 | 5/9/15 | Indianapolis Motor Speedway Road Course | 1 | 1 |
| 9 | Cooper Tires Freedom 90/Day Before the 500 | 5/23/15 | Lucas Oil Indianapolis Raceway Park | 10 | 15R |
| 10 | Cooper Tires Pro Mazda GP of Toronto-1 | 6/13/15 | Streets of Toronto | 4 | 7 |
| 11 | Cooper Tires Pro Mazda GP of Toronto-2 | 6/14/15 | Streets of Toronto | 7 | 4 |
| 12 | Pro Mazda Iowa 100 | 7/18/15 | Iowa Speedway | 2 | 5 |
| 13 | Cooper Tires Pro Mazda GP of Mid-Ohio-1 | 8/1/15 | Mid-Ohio Sports Car Course | 4 | 1 |
| 14 | Cooper Tires Pro Mazda GP of Mid-Ohio-2 | 8/2/15 | Mid-Ohio Sports Car Course | 3 | 3 |
| 15 | Allied Building Products GP of Monterey-1 | 9/12/15 | Laguna Seca Raceway | 2 | 2 |
| 16 | Allied Building Products GP of Monterey-2 | 9/13/15 | Laguna Seca Raceway | 1 | 2 |