On December 26, 2019, the Blackhawks placed Seabrook on long-term injured reserve after announcing he would require three separate surgical operations to repair his right shoulder and both hips. Seabrook missed the remainder of the 2019–20 season. He returned to practice with the team in July to prepare for the 2020 Stanley Cup playoffs, which had been postponed to August due to the COVID-19 pandemic. Seabrook opted out of the playoffs on July 24 to focus on fully recovering from his surgery.