Professional and amateur sport throughout the world experienced an industry-wide disruptions caused by the COVID-19 pandemic. The initial stage of the pandemic required the postponement of leagues and games, until athletic events were resumed without fans. This disruption required the sport industry to adapt and supply substitute products to engage users without the access to the primary product, live sport. In this study, we compare how a North American league (National Basketball Association) and a European league (English Premier League) adapted to these changes using social media to engage with fans. We examine changes in the volume of Tweets and engagements with official team Twitter posts. Our data contain categorical control variables accounting for different stages of the pandemic. This includes when games were canceled for health and safety reasons, when play was resumed in a bubble format, in-season periods, and offseason periods. Examining social media engagement during these periods is a unique opportunity to compare team (supply) strategies and fan reactions (demand) to a disruption, and to explore the longer-term implications such as expanded engagement after the disruption has ended or when its effects have lessened.