Arizona Cardinals defensive lineman Darius Robinson is revealing his huge offseason gains. Why along with Marvin Harrison Jr., D-Rob bulked after his rookie season for the Cards. #azcardinals #dariusrobinson #marvinharrisonjr #nfl SUBSCRIBE: youtube.com/channel/UCKaPEqS_Mc6eGNNBQN1QgQw Website: gophnx.com PHNX Locker: PHNXLocker.com Social Twitter: @PHNX_Sports Instagram: @PHNX_Sports