Hills, a former fourth-round draft choice of the Pittsburgh Steelers who played three games with the Dallas Cowboys in 2014, is entering his seventh season. The 6-5, 304-pound tackle has played in 13 career games with one start, which he made in 2012 with the Indianapolis Colts.
Wallace signed with Miami Dolphins as an undrafted rookie guard from New Mexico State in 2014. The 6-3, 313-pound lineman played both guard and tackle during his four-year college career.
Reaves played six games with one start as an undrafted rookie last season. He rushed 31 times for 78 yards and recorded five catches for 31 yards.