Mark Martin led the way with a lap of 50.173 seconds in the fourth practice for the Pocono 400 by #NASCAR from Pocono. Rounding out the top five was Jamie McMurray, Dale Earnhardt, Jr., Jimmie Johnson, and AJ Allmendinger.PosCarDriverTeamTimeBehind155Mark MartinAaron's Dream Machine Toyota50.173Leader21Jamie McMurrayBanana Boat Chevrolet50.297-0.124388Dale Earnhardt Jr.National Guard / Diet Mtn.
