Bolston signed with the Vikings as a non-drafted free agent in May, and spent the first 12 weeks of the season on the Vikings' practice squad before he was signed to the active roster Nov. 28. He appeared in one game and had one tackle.
A 6-foot-4, 300-pound player from Maryland, Bolston appeared in 44 games (30 starts) for the Terrapins and had 10 career sacks.
Bolston will wear No. 93.