It looks like Richard Petty Motorsports and its soon-to-be former sponsor Smithfield Foods aren’t wasting any time airing out their dirty laundry. Smithfield CEO Kenneth Sullivan issued a response to Richard Petty’s statement Tuesday, and he didn’t pull any punches, calling out RPM for “years of subpar performance on the track.” Earlier Tuesday, Petty said that he and his eponymous team were “extremely disappointed” — words that Sullivan echoed in his statement — with Smithfield’s decision to sign with Stewart-Haas Racing for 2018. The seven-time Monster Energy NASCAR Cup Series champion also claimed that Smithfield had made a handsh... NESN.com