At the first race of the season, the season opening 2017 24 Hours of Daytona, the 2 cars struggled during qualifying, with both cars coming home 9th and 10th during the session, trailing the pole sitting Cadillac by 3 seconds, the #55 finishing ahead of the #70.
The car's debut race would prove to also be challenging for Mazda, with the #55 car retiring just 4 hours from the finish, after the crew of the #55 had clawed their way up the order to 5th overall, before the car become engulfed in flames in pitlane, due to an oil fire.
The sister #70 also encountered a drama-filled race, with the car finishing 197 laps down the leader, after a series of troubles, including a trip to the pitlane on just the second lap of the race, due to a piece of plastic becoming lodged into the air intake, while later in the race, a penalty, combined with a collision with the #10 Cadillac DPi-V.R, necessitated yet another unscheduled trip to the pitlane, in order to repair the rear wing assembly, before the car became beset with clutch and transmission issues, in the 6th hour of the race.

At the second race of the season, the 2017 12 Hours of Sebring, the 2 cars came home 8th and 10th during the qualifying session, the #90 Riley sandwiched between the 8th placed #55, and 10th placed #70, with the #70 trailing the pole sitting car by 2.1 seconds, while the #55 1.7 seconds behind, in a much improved showing compared to Daytona.
During the race, only the #55 Mazda made it home to the finish, 5th in the Prototype class, and 29th overall, 29 laps down on the leader, while the #70 had a eventful race, including a sizeable incident on the entry to the final corner and consequently losing a much time due to repairs.

At the third race of the season, the 2017 BUBBA Burger Sports Car Grand Prix, held at the Long Beach Circuit, the cars saw an upturn in pace, with the #55 car qualifying in 3rd, just 6 tenths off the pole sitting #10 Wayne Taylor Racing Cadillac, while the sister #70 car qualified further back, in 7th, 1.4 seconds behind the pole sitting car.
 The race saw the #55 car score the first podium for the car, with the pairing of Tristan Nunez, and Jonathan Bomarito coming in 3rd, 15 seconds behind the leader, due to yellow flag, while the #70 finished a lap down, in 21st overall, and 7th in class.

At the fourth race of the season, the Advance Auto Parts Sportscar Showdown, held at the Circuit of the Americas, the cars fell back pace-wise, relative to the rest of the field for qualifying, with the #55 ending the session 7th, 2.4 seconds slower than the pole sitter, and the #70 qualifying behind in 10th, 3.1 seconds away from the pole time .
During the race, both cars would suffer from electrical issues, with the #55 being forced to retire, while the #70 finished well down the order, in 33rd position overall.

For the fifth race of the season, the Chevrolet Detroit Grand Prix, held at the Detroit street circuit, it had initially appeared that the #55 of Jonathan Bomarito would start from the front row of the grid, in 2nd place, having been beaten to pole by Renger Van Der Zande in the #90 VisitFlorida Racing Riley-Multimatic MkXXX during the qualifying session, which lasted a mere 5 minutes.
However, this result was later nullified, after the it was determined insufficient green-flag running had occurred for it to be an official session, after Ricky Taylor had set the fastest lap in the session, only to crash moments later, resulting in the session-ending red flag with just 5 minutes of running left on the clock.
As a result, it was determined that the starting order will be set by championship standings for the race.
During the race, the #70 would score the car's second podium, and the first for the #70 crew of Tom Long and Joel Miller, with the #70 finishing 34.502 seconds behind the race leader.
In the sister #55 car, Tristan Nunez had originally looked set to come home 6th, but later took advantage of a late-race spin by Stephen Simpson in the JDC-Miller Oreca, to finish 5th.

At the sixth round of the season, the Sahlen's Six Hours of the Gle
At the first race of the season, the season opening 2017 24 Hours of Daytona, the 2 cars struggled during qualifying, with both cars coming home 9th and 10th during the session, trailing the pole sitting Cadillac by 3 seconds, the #55 finishing ahead of the #70. The car's debut race would prove to also be challenging for Mazda, with the #55 car retiring just 4 hours from the finish, after the crew of the #55 had clawed their way up the order to 5th overall, before the car become engulfed in flames in pitlane, due to an oil fire. The sister #70 also encountered a drama-filled race, with the car finishing 197 laps down the leader, after a series of troubles, including a trip to the pitlane on just the second lap of the race, due to a piece of plastic becoming lodged into the air intake, while later in the race, a penalty, combined with a collision with the #10 Cadillac DPi-V.R, necessitated yet another unscheduled trip to the pitlane, in order to repair the rear wing assembly, before the car became beset with clutch and transmission issues, in the 6th hour of the race. 
At the second race of the season, the 2017 12 Hours of Sebring, the 2 cars came home 8th and 10th during the qualifying session, the #90 Riley sandwiched between the 8th placed #55, and 10th placed #70, with the #70 trailing the pole sitting car by 2.1 seconds, while the #55 1.7 seconds behind, in a much improved showing compared to Daytona. During the race, only the #55 Mazda made it home to the finish, 5th in the Prototype class, and 29th overall, 29 laps down on the leader, while the #70 had a eventful race, including a sizeable incident on the entry to the final corner and consequently losing a much time due to repairs.
At the third race of the season, the 2017 BUBBA Burger Sports Car Grand Prix, held at the Long Beach Circuit, the cars saw an upturn in pace, with the #55 car qualifying in 3rd, just 6 tenths off the pole sitting #10 Wayne Taylor Racing Cadillac, while the sister #70 car qualified further back, in 7th, 1.4 seconds behind the pole sitting car.  The race saw the #55 car score the first podium for the car, with the pairing of Tristan Nunez, and Jonathan Bomarito coming in 3rd, 15 seconds behind the leader, due to yellow flag, while the #70 finished a lap down, in 21st overall, and 7th in class.
At the fourth race of the season, the Advance Auto Parts Sportscar Showdown, held at the Circuit of the Americas, the cars fell back pace-wise, relative to the rest of the field for qualifying, with the #55 ending the session 7th, 2.4 seconds slower than the pole sitter, and the #70 qualifying behind in 10th, 3.1 seconds away from the pole time . During the race, both cars would suffer from electrical issues, with the #55 being forced to retire, while the #70 finished well down the order, in 33rd position overall.
For the fifth race of the season, the Chevrolet Detroit Grand Prix, held at the Detroit street circuit, it had initially appeared that the #55 of Jonathan Bomarito would start from the front row of the grid, in 2nd place, having been beaten to pole by Renger Van Der Zande in the #90 VisitFlorida Racing Riley-Multimatic MkXXX during the qualifying session, which lasted a mere 5 minutes. However, this result was later nullified, after the it was determined insufficient green-flag running had occurred for it to be an official session, after Ricky Taylor had set the fastest lap in the session, only to crash moments later, resulting in the session-ending red flag with just 5 minutes of running left on the clock. As a result, it was determined that the starting order will be set by championship standings for the race. During the race, the #70 would score the car's second podium, and the first for the #70 crew of Tom Long and Joel Miller, with the #70 finishing 34.502 seconds behind the race leader. In the sister #55 car, Tristan Nunez had originally looked set to come home 6th, but later took advantage of a late-race spin by Stephen Simpson in the JDC-Miller Oreca, to finish 5th.
At the sixth round of the season, the Sahlen's Six Hours of the Gle
Mazda RT24-P