Hassell, 25, wound up going undrafted out of Florida Tech back in April of last year. He later agreed to a three-year, $1.71 million contract with the Browns, but was waived coming out of the preseason.
The Browns later re-signed Hassell to their practice squad after clearing waivers. The Patriots later signed him to their practice squad.
In 2020, Hassell appeared in four games for the Browns and recorded five tackles and no interceptions.