Michael Gehlken of the Dallas Morning News reports Thompson tested positive. It is unknown whether Hamilton tested positive or is a high risk close contact.
Thompson may not have played Sunday anyway as the team listed him as questionable with a concussion.
Thompson is only the second player on the 53-player roster to test positive for the coronavirus. Quarterback Andy Dalton missed a game against the Eagles earlier in the season with COVID-19.
Practice squad defensive tackle Walter Palmore also contracted COVID-19 in November.