Denny's Serves FREE Grand Slams if a Grand Slam is Hit in the Final Post-Season Series

America’s Diner will serve up the iconic breakfast to Denny’s Rewards members nationwide for the first post-season professional grand slam hit Denny's Grand Slam Giveaway America’s Diner will serve up the iconic breakfast to Denny’s Rewards members nationwide for the first post-season professional grand slam hit Spartanburg, S.C., Oct. 20, 2025 (GLOBE NEWSWIRE) -- Denny’s is giving baseball fans another reason to slide into a booth with a nationwide giveaway: if a Grand Slam is hit by either team during ...