The 49ers signed Yiadom on Friday, Jeremy Fowler of ESPN.com reports.
Yiadom was ruled out for the remainder of Sunday's game against the Falcons with a concussion, Katherine Terrell of ESPN.com reports.
The Saints signed Yiadom on Thursday, Aaron Wilson of KPRC 2 Houston reports.
Yiadom was waived by the Texans on Tuesday, Brooks Kubena of the Houston Chronicle reports.
Yiadom (thigh) is inactive Sunday against the Chargers.
Yiadom (thigh) logged a full practice Friday.
Yiadom is out for Sunday's matchup against the Bears.
Yiadom (undisclosed) was activated from the reserve/COVID-19 list Saturday.
Yiadom (undisclosed) was placed on the reserve/COVID-19 list Wednesday.
Yiadom is likely to start in place of Kevin King (shoulder) in Sunday's matchup against the Bears, Jason Wilde of ESPN.com reports.