Saubert signed to the 49ers' 53-man roster Wednesday, Nick Wagoner of ESPN.com reports.
Saubert was released by the team Tuesday but returned as a third tight end behind George Kittle and Jake Tonges. The veteran made 10 combined appearances for the Cowboys and Texans last season, playing more on special teams than offense. Saubert's best statistical season came in 2022 with Denver when he caught 15 passes for 148 yards and a touchdown.