Dyson Racing's Guy Smith set the quickest time in the opening practice for the Baltimore Sports Car Challenge presented by SRT. The Briton's lap of 1:25.899 (85.496 mph) on the 2.04-mile, 12-turn street circuit in the No. 16 Lola-Mazda led Muscle Milk Pickett Racing's Klaus Graf by 0.289 second.
Corvette Racing sat 1-2 in GT with their Corvette C6 ZR1s, led by Tommy Milner in the No. 4 Corvette. He set a time of 1:30.580 and went 0.356 second quicker than Jan Magnussen in the No. 3 sister car. A pair of BMW Team RLL BMW M3 GTs was third and fourth; Joey Hand was the quickest of the two at 1:31.110).
Conquest Endurance's Martin Plowman led P2 in the No. 37 Morgan-Nissan prototype. His time of 1:28.021 – good enough for third overall - was 0.923sec clear of Level 5 Motorsports' Christophe Bouchut. Conquest won in class at Road America but Level 5 leads the class championship.
Having already clinched the Prototype Challenge team championship, CORE autosport still held the first two positions in class. Ryan Dalziel set the pace in the No. 6 ORECA FLM09 at 1:28.538 and was 0.079sec clear of teammate Colin Braun in the No. 05 car. Merchant Services Racing's Kyle Marcelli was third at 1:28.806.
Green Hornet Racing's Damien Faulkner posted the best GT Challenge time in his No. 34 Porsche 911 GT3 Cup. His lap of 1:34.854 gave the Irishman a 0.238sec gap back to TRG's Spencer Pumpelly.