According to Adam Schefter, the Dolphins claimed five players off waivers on Sunday.
Lacy, 29, wound up signing on with the Cowboys as an undrafted free agent out of West Alabama back in 2013. He lasted just a few months in Dallas before joining the Edmonton Eskimos of the CFL for the 2014 season.
Lacey would return to the NFL and sign with the Dolphins in 2017. From there, he was claimed off of waivers by the Bills. Lacey re-signed with the Bills as an exclusive rights free agent this offseason before being released during final cutdowns.
In 2018, Lacey appeared in all 16 games for the Bills and recorded seven tackles.