Now 32, Blackett has joined USL club New Mexico United.
Speaking to USL media, United Sporting Director Itamar Keinan said: “We are thrilled to add someone with Tyler’s pedigree to our club.
“Tyler is not only bringing a wealth of experience with him, but also real quality and leadership to our backline.
“Welcome to the Black and Yellow Tyler!”
Blackett hasn't played competitive football since being released by Rotherham United at the end of the 2023/24 season. He also spent four seasons at Reading before going to Nottingham Forest for just one.
Blackett has previous experience in the USA, having played for FC Cincinnati.
New Mexico currently sit sixth in the Western Conference of the USL.