Claiming his first win in the series in 2007,[1] Rojas won his first 24 Hours of Daytona endurance race the following year with co-drivers Pruett, Juan Pablo Montoya and Dario Franchitti.

[1] Over the course of the year Rojas set another series record for most victories in a season with nine, and finished on the podium eleven times in twelve races.

[1][5] Rojas' 2011 season started with a co-victory, partnered with Pruett, Graham Rahal and Joey Hand, in the 24 Hours of Daytona, his second win in the event.

[7][8] On the 62nd edition of the 12 Hours of Sebring on March 15, 2014, Memo Rojas Jr., from Telmex Ganassi Riley Mk XXVI-Ford EcoBoost DP team won the second round of the new United SportsCar Championship by just under five seconds as nine cars in the Prototype class finished on the lead lap.

Along with his co-drivers Scott Pruett and Marino Franchitti, Rojas Jr., become the first Mexican to achieve a victory in the 12 Hours of Sebring.