May 15, 2020 Grand Slam Admin News classic rock, grand slam, music festival, planet rock, planet rock radio, planet rock stock News just in Slammers. Grand Slam will be rocking at Planet Rockstock in December 2020 – more exciting news on its way… Head to the Planet Rockstock Website for full details! 0 Facebook Twitter News Grand Slam & Heavy Pettin’ announce December show in Stoke-On-Trent! May 6, 2020 Previous Article News December 2020 Tour Dates Announced! May 22, 2020 Next Article