Jackson is signing with the Dolphins' practice Tuesday, pending a physical, Zack Rosenblatt of The Athletic reports.
Jackson signed with the Jets as a UDFA out of Washington State and had a solid training camp, but he failed to make the 53-man roster. After being waived by the team, he did sign with the Jets' practice squad, but he was ultimately cut Sept. 6. He'll now work to make the most of his opportunity in Miami.