The Indianapolis Colts signed free agents center Thomas Austin, guard Marcus Hall and wide receiver Nu'Keese Richardson on Friday.
The Colts also waived guard Chad Anderson, injured outside linebacker Daniel Adongo, defensive tackle Jeris Pendleton and cornerback Brandon Burton from Injured Reserve with an injury settlement.
The 6-foot-4, 310-pound Austin appeared in eight career NFL games, making one start. He previously spent time with the Carolina Panthers (2012) and Houston Texans (2011).
Hall, 6-5, 315 pounds, was originally signed by the Colts as an undrafted free agent on May 13 and waived on June 12. He competed in 46 career games for Ohio State, including 31 starts.
The 5-10, 160-pound Richardson played for the University of Pikeville in 2013, where he recorded 39 receptions for 588 yards and three touchdowns in nine games.