Penske Racing places three cars in top five; points leader Dillon 13th
Currently tied for second in the standings with Regan Smith, Hornish is coming off a runner-up finish at Iowa and had a top-five finish at Road America earlier this season.
Brad Keselowski, who ran ninth-fastest in the Sprint Cup practice, was second in Nationwide practice with a best speed of 122.291 mph and best time of 72.123 seconds. Smith was third on the leaderboard with a lap of 72.378 seconds.
Points leader Austin Dillon battled his No. 3 AdvoCare Chevrolet for a 13th-place speed.
Despite running the most laps at 18, Trevor Bayne fell just 16th on the speed charts.
A caution flag was thrown with more than 30 minutes to go in practice after the No. 23 of Anthony Gandon spun and needed to be towed from the track. A second incident occurred when Morgan Shepherd's car started smoking. Officials inspected the track for oil before the practice returned to green. Shepherd did not complete a lap.
Elliott Sadler saw some damage to his No. 11 OneMain Financial Toyota after spinning out and hitting a barrier. Sadler finished the practice 12th-fastest.
An extended period of heavy rain caused practices to be delayed several hours, causing both Sprint Cup Series practices and the Nationwide Series practice to be shortened. Qualifying for the Zippo 200 will take place at 9:35 a.m. ET Saturday.