1989 season for Fittipaldi to drive. In return, Penske would take driver Fittipaldi and sponsor Marlboro starting with the 1990 season. Furthermore, Penske would receive interim Marlboro sponsorship to field a third car (Al Unser Sr.) at the three 500-mile races in 1989 (Indy 500, Michigan 500, Pocono 500). For 1990, Chip Ganassi would take over the assets of Patrick Racing (including the two coveted PC-18 chassis, as well as the important Ilmor Chevrolet engine lease), which he would use to start his own team. The Patrick team experienced dominating success in the 1989 CART season. After winning the 1989 Indianapolis 500 and the 1989 CART championship, at some point Pat Patrick changed his mind about retiring. With the wheels already in motion to dissolve his existing team, he decided to explore options, and was coaxed out of retirement for 1990. Second stint As planned, Ganassi split off to form his own team in 1990 (Chip Ganassi Racing). Pat Patrick took over the upstart Alfa Romeo Indy car project previously run by Alex Morales Motorsports. Roberto Guerrero signed on as primary driver with Al Unser Sr. driving a second car at the Indy 500 and the Michigan 500. The new Patrick Racing team landed sponsorship from Miller. It was effectively another "trade" between Penske and Patrick, as Miller (previously with Penske) and Marlboro (now over at Penske) were owned by the same parent company, Phillip Morris. The services of Al Unser Sr. were also effectively a trade between the two outfits. Guerrero, meanwhile, had been with Alex Morales Motorsports running the Alfa Romeo on a part-time schedule in 1989. The team saw little on-track success, and even less success in the engine development. This despite a significant investment by Alfa Romeo, and the retention of key crew members including Jim McGee and Mo Nunn. Al Unser had to sit out the Michigan 500 after he wrecked in practice, suffering a fractured leg. Unser then quit the team. For 1991, Danny Sullivan took over as primary driver (also another former Penske driver), and the team continued to fail miserably. Guerrero stayed on as a second driver for the Indy 500 and other selected races. That year, Guerrero would be involved in a controversial crash at Indianapolis with Kevin Cogan. By the end of the 1991 CART season, Patrick was in financial and legal trouble. Rumors surfaced that the Patrick team had