Robinson, 24, entered the league in 2021 as an undrafted free agent out of Stanford, signing with the Denver Broncos. The team released Robinson on November 30, 2021, and the 49ers signed him to their practice squad on December 6, 2021. San Francisco signed the linebacker to a reserve/future contract in February.
Robinson recorded six tackles and a quarterback hit in six games last season, per Pro Football Reference.