The Lions released Grigsby on Friday, Tim Twentyman of the Lions' official site reports.
Grigsby suited up for nine games with the Patriots and three with the Lions this season, and he only worked on special teams with the latter. The 26-year-old will look for a similar role in the 2019 campaign.
Grigsby's spot on the 53-man roster comes following the placement of Marvin Jones (knee) on injured reserve. The second-year linebacker spent the 2017 season on New England's roster before being waived earlier this month, so coach Matt Patricia is familiar with his skillset. He'll likely see most of his snaps on special teams.
Grigsby was waived by the Patriots on Tuesday, Field Yates of ESPN reports.
Grigsby had 10 tackles (seven solo) across nine games with New England this season, and played only 28 total defensive snaps as he mostly served in a special teams role. The second-year linebacker out of Pittsburgh will hope to join the practice squad or latch on elsewhere.
Grigsby (illness) is not listed on Wednesday's injury report, Zack Cox of NESN.com reports.
Grigsby missed Sunday's win over the Packers due to an illness, but appears to have fully recovered. The undrafted rookie is on track to suit up against the Titans in Week 10, and is expected to take most of his snaps on special teams.
|2017||New England Patriots||5||5||4.0||1||0||0||0||0.0||0||0||0|
|2018||New England Patriots||9||10||7.0||3||0||0||0||0.0||0||0||0|