The 49ers signed Ya-Sin (knee) to a one-year deal Thursday, Field Yates of ESPN reports.
Ya-Sin (knee) will be inactive for Sunday's AFC Champhionship Game versus Kansas City.
Ya-Sin (knee) is listed as questionable ahead of Sunday's AFC Championship Game against the Chiefs.
Ya-Sin (illness) was not listed on Baltimore's injury report Wednesday.
Ya-Sin (illness) is inactive ahead of Sunday's game against the Seahawks.
Ya-Sin (knee) returned to practice Wednesday.
Ya-Sin (knee) is expected back "very soon," per coach John Harbaugh, Brian Wacker of the Baltimore Sun reports.
Ya-Sin didn't tear anything in his knee following his MRI on Thursday, Ian Rapoport of NFL Network reports.
Ya-Sin (undisclosed) left camp Wednesday with an apparent injury, Morgan Adsit of Fox Baltimore reports.
Ya-Sin is signing with Baltimore on a one-year contract for up to $6 million, Adam Schefter of ESPN reports.