Washington signed Sternberger from Seattle's practice squad Wednesday, independent NFL reporter Dov Kleiman reports.
Sternberger spent two weeks on the Seahawks' practice squad after he was waived by the Packers in mid-September, and he'll now serve as depth at tight end for Washington after Logan Thomas (hamstring) was placed on injured reserve. The 25-year-old appeared in 12 games for Green Bay last year and hauled in 12 of his 15 targets for 114 yards and a touchdown.