The Dolphins signed linebacker Curtis Bolton, who spent the last two seasons with Las Vegas, and waived quarterback Gavin Hardison, the undrafted rookie from Texas-El Paso.
Bolton, who entered the league in 2019 with Green Bay as an undrafted rookie from Oklahoma, totaled one tackle from scrimmage and 15 special teams tackles in 13 games.
Bolton played in 10 games in 2022 with the Raiders and five games with the Detroit Lions in 2021.
Bolton has been on the practice squad with Indianapolis and San Francisco (2021) and Houston (2020).
Hardison struggled Wednesday and Thursday when he got additional snaps because quarterback Tua Tagovailoa was sat out part of practice (Wednesday) and an entire practice (Thursday).
The Dolphins were off Saturday.
The Dolphins are back on the practice field at 10 a.m. Sunday at Baptist Health Training Center.
Sunday marks the first practice of training camp open to the public. Admission is free but tickets are required.