Washington coach Ron Rivera said that after Fitzpatrick undergoes the MRI, doctors can then evaluate him to determine the next course of action.
Fitzpatrick suffered a hip subluxation in the first half of Washington's season-opening loss to the Los Angeles Chargers. His initial timetable was six to eight weeks, a source said. But others cautioned that it was not a firm timetable. Rivera said he did not give any time frame for Fitzpatrick's return after the injury.
With Fitzpatrick out at least a couple more weeks -- or possibly much longer -- Washington (2-5) will continue to start Taylor Heinicke, who has started the past six games. He has thrown 10 touchdown passes and seven interceptions.
Washington has lost three consecutive games, including a 24-10 defeat at Green Bay on Sunday.
Washington signed Fitzpatrick to a one-year deal this offseason. Rivera and others preached the value of his experience throughout training camp.