Red Robin Gourmet Burgers, Inc. announced unaudited preliminary comparable restaurant revenue results for the fourth quarter ended December 27, 2020. For the quarter, the company reported net comparable restaurant revenue decreased 28.9%, primarily resulting from company's operational shift in response to COVID-19, including limited occupant capacity, operating an off-premise only model at restaurants with closed dining rooms, and closed restaurants; Off-premise sales increased 132% and comprised 43.9% of total food and beverage sales; and Restaurants with Donatos® outperformed restaurants that do not currently offer Donatos® by over 500 basis points in net comparable restaurant revenue.