Ventrone, 25, was signed from the practice squad to the 53-man roster prior to the Buffalo game and made his NFL debut against the Bills. The 5-8, 190-pound safety was released from the 53-man roster last Saturday prior to the Oakland game and resigned to the practice squad on Oct. 4.
Adams, 23, was signed by the Patriots on Sept. 21 and was active but did not play in the games at Buffalo on Sept. 25 or Oakland on Oct. 2. The 5-11, 192-pound defensive back was originally drafted in 2010 by San Francisco in the seventh round (224 overall) out of South Carolina State. He played in 15 games for the 49ers last season and finished with 13 total tackles and one pass defensed.