Murphy played in the final three contests in 2017 and had one tackle on special teams.
Mama was signed on Dec. 12 off the Chiefs’ practice squad and was inactive for the last three games. Severin was in training camp and on the practice squad for a week. He signed a reserve/futures contract on Jan. 1, the same day Rehkow was signed.
Watson was signed by the Giants on Jan. 24.
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