MESA, Ariz. -- Patrick Peterson stood near the back of his favorite car, a silver, custom-built 1973 Chevrolet Caprice, admiring his most prized possession.
His portfolio of cars sat parked behind him.
For most, it would be called a collection, a tribute to American muscle cars -- on steroids -- almost all Chevrolets, most from the late 1960s and early 1970s, with a bit of luxury mixed in.
But to Peterson, the Arizona Cardinals' six-time Pro Bowl cornerback, the 12 cars that sat parked in his garage, with two more outside, were an investment.