Roger Penske's 50 years in racing

Roger S. Penske of Gladwyne, Pa., displays the checkered flag after he won the 100-mile race in the June sprints of the Road America in Elkhart Lake, Wis. June 19, 1961.

Simon Pagenaud holds up the Astor Cup after winning the 2016 IndyCar championship as team owner Roger Penske, lower right, looks on.

Roger Penske hugs IndyCar Series driver Juan Pablo Montoya as they celebrate in victory circle after winning the 2015 Indianapolis 500.

IndyCar Series driver Juan Pablo Montoya celebrates with team owner Roger Penske (left) and his family in victory circle after winning the 2015 Indianapolis 500.

Roger Penske of Gladwyne, Pa., right, receives a trophy from Peter Donald for his record-breaking win in the Nassau, Bahamas tourist Race, Dec. 2, 1962. Penske drove his Ferrari coupe over the 25-lap race at a speed of 88.255 miles per hour, breaking the record set by Sterling Moss in 1960.

Helio Castroneves, front left, talks with four-time Indianapolis 500 champion Rick Mears, right, in front of car owner Roger Penske during practice for the Indianapolis 500 in 2015. Castroneves has won the race three times; Mears four.

Rick Mears, second from right, team owner Roger Penske, right, and their wives, Kathy Penske, left, and Chris Mears, second from left, celebrate as they take a victory lap after the 72nd running of the Indianapolis 500. This was Mears' third of a record-tying four wins in IndyCar's premier event.

Roger Penske of Gladwyne, Pa., drives a borrowed Chaparral Chevrolet to victory in the 252-mile International Trophy race at Nassau, Bahamas, Dec. 7, 1964.

IndyCar Series driver Helio Castroneves (left) has given team owner Roger Penske three of his record 16 wins in the Indianapolis 500.

NASCAR Sprint Cup Series driver Joey Logano (right) celebrates with team owner Roger Penske in victory lane after winning the Daytona 500 on Feb. 22, 2015.

Will Power holds the Astor Cup after winning the 2014 IndyCar Series season championship Aug. 30, 2014. It was Penske's 13th title in open wheel.

Roger Penske talks with fellow team owner Chip Ganassi before the Honda Indy Toronto in 2013. Penske and Ganassi are rivals at the top levels of IndyCar, NASCAR and sports cars. Penske has 16 Indy 500 wins to Ganassi's four.

Mark Donohue with legendary team owner and entrepreneur Roger Penske at Grand Prix of France, Circuit Paul Ricard, France on July 6, 1975.

NASCAR Sprint Cup Series driver Brad Keselowski (right) and team owner Roger Penske celebrate after winning the 2012 championship.

Roger Penske holds a trophy after his driver, Ryan Newman, won the Daytona 500 on Feb. 17, 2008.

From left, Roger Penske, driver Ryan Newman, crew chief Roy McCauley and Greg Newman, Ryan's father, and the team pose with their Daytona 500 winning car in 2008.

Mark Donohue, shown in 1973, gave Penkse his first Indianapolis 500 victory, in 1972. (AP)