The IMSA WeatherTech SportsCar Championship began the second day of the Continental Tire Road Race Showcase weekend with a third one-hour practice session, topped by Jonathan Bomarito in the No. 55 Mazda Prototype.

Bomarito, having led the weekend’s first practice session in which Mazda swept the top spots, sped around the 4.048-mile Road America circuit in 1:55.021 to put Mazda on top once again.

Mazda’s bid for a second 1-2 showing in the weekend’s practice sessions was interrupted by Jordan Taylor’s lap of 1:55.435 in Wayne Taylor Racing’s No. 10 Corvette DP, a car that has challenged for the top spot through the three WeatherTech Championship sessions so far this weekend.

Joel Miller rounded out the top three in Mazda Motorsports’ second entry, the No. 70, with a best lap of 1:55.832, marking an improvement of one second over the car’s fastest time from Friday.

Each of the three LMP2-style cars that contest the full WeatherTech Championship season reached the top five in the session, with Ozz Negri placing Michael Shank Racing’s No. 60 Ligier JS P2 in the fifth position in Practice 3 behind Christian Fittipaldi’s best lap in the No. 5 Corvette DP of Action Express Racing.

Renger van der Zande was the fastest driver in Prototype Challenge due to a lap of 1:58.898 in Starworks Motorsport’s No. 8 Oreca FLM09. The Dutch driver’s class-leading lap was the only PC lap in the session faster than Friday’s quickest time.

It was an all-American top three in the GT Le Mans ranks in Practice 3, with Antonio Garcia pedaling Corvette Racing’s No. 3 entry to the top with a lap of 2:02.620. Joey Hand placed the No. 66 Ford GT second in the class while Oliver Gavin’s 2:02.810 marked the class’ third-fastest time.

The No. 48 Lamborghini Huracán GT3 of Paul Miller Racing topped the GT Daytona running order for the second time of the weekend at the hands of Bryan Sellers. Alex Riberas was second fastest in the No. 23 Alex Job Racing Porsche 911 GT3 R while a second Lamborghini, the No. 27 of Dream Racing, completed the top three.

Next up for the four classes of the WeatherTech Championship is qualifying, set to begin at 2:50 p.m. CDT.