Starting the race in the second row will be Memo Rojas (1m 20.371a; 100.371 mph) in the #01 TELMEX Chip Ganassi Racing with Felix Sabates Lexus Riley he shares with Scott Pruett, and the #23 Ruby Tuesday Championship Racing Team Porsche Crawford of Bill Auberlen and Joey Hand (1m 20.318; 100.311 mph).
Rojas - serving a two-race probation period starting with this weekend - and Pruett will be seeking their fourth victory in five races this season in Saturday's event.
Brian Frisselle was fifth in the #61 AIM Autosport Ford Riley co-driven by Mark Wilkins, while Jimmy Vasser timed in sixth in the #98 GAINSCO/Bob Stallings Racing Pontiac Riley he shares with Cristiano da Matta. The latter is making his comeback to racing following a two-year layoff after a testing accident in the Champ Car World Series.
In GT, Nick Ham won his first pole of the season for SpeedSource, and second for the team after co-driver Sylvain Tremblay won the pole at the Rolex 24 At
Daytona. Ham ran a lap of 1m 27.014s (92.592 mph) in the #70 SpeedSource Mazdaspeed/Castrol Syntec Mazda RX-8.
"We ran a fast lap in the afternoon practice, so I knew we had a shot at the pole. But I knew it would be close, because the Farnbacher and Banner cars had also been very fast. I laid down a fast lap that I thought might be good for the pole, but then Kaffer ran two-tenths faster. Fortunately, I was able to get another clean lap and win the pole," said Ham.
"Even though the pole doesn't mean anything once the race starts, we've been in a small slump since winning the Rolex 24 At Daytona. Winning the pole is a great motivation for the team and all their hard work. Now, we need to win the race tomorrow for Castrol and Mazda at its home track."
Pierre Kaffer, making his third start of the season for Farnbacher Loles Racing, was second fastest in the #87 Porsche GT3. Kaffer, who shares the car with defending Rolex Series GT driving champion Dirk Werner, was the polesitter for the Mexico City 250 last month.