He is the older brother of Pablo Pérez Companc, also involved in motorsport as a one-time Indy Pro Series racer with the Chip Ganassi Racing team, but who suffered serious injuries in an on-track incident in 2007.
In 1995 Groff's only on-track activity was practice laps for the 1995 Indianapolis 500 with Chip Ganassi Racing, but he did not make an attempt to qualify.
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David Stremme, who lost his ride in the #40 Chip Ganassi Racing Dodge last year after they signed Dario Franchitti, will replace the defending Indy 500 champion after Franchitti broke his ankle in the Nationwide Series race on Saturday.
Winning the race overall was the Daytona Prototype team of Chip Ganassi Racing, with drivers Scott Pruett, Memo Rojas, Graham Rahal and Joey Hand driving the #01 Riley & Scott-BMW defeating Chip Ganassi Racing's second team, consisting of IndyCar drivers Scott Dixon and Dario Franchitti, and Sprint Cup teammates Jamie McMurray and Juan Pablo Montoya in the #02 Riley & Scott-BMW by just over two seconds in a one-lap sprint following a late caution flag.
The Chicago Motor Speedway at Sportsman's Park located in Cicero, Illinois, just outside of Chicago, was built in 1999 by a group including Chip Ganassi, owner of Chip Ganassi Racing.
Drivers Sterling Marlin, 2003 Rookie of the Year Jamie McMurray, and Casey Mears of Chip Ganassi Racing and Larry Foyt are not in the game as playable drivers but can be added by downloadable content.
On January 4, 2014, Chip Ganassi Racing announced that McMurray will run the 24 Hours of Daytona for the team in the No. 1 car alongside Scott Pruett, Memo Rojas and Sage Karam.
The 2011 race was again won by Chip Ganassi Racing, this time with a BMW engine.