LONG POND, Pa. (AP) -- Pocono Raceway has undergone a series of changes in its first race without founder and chairman Joseph "Doc'' Mattioli.

Mattioli died in January. His portrait is on the cover of the race program, commemorative decals are stuck on the Sprint Cup cars, staff workers wear pins, and his name is painted in yellow on rocks outside the garage area.

Pocono shortened its race to 400 miles and underwent an overdue repave that led to breakneck speeds on two days of testing.

The race is called the Pocono 400 Presented by #NASCAR. The race marks Twitter's first official partnership with a sports league.

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