The 6-foot-5, 257-pound Adongo most recently played for the Southern Kings of Super 15 Rugby, the highest level of pro rugby in the world. He also played in the 2012 Varsity Cup for the University of Pretoria Tuks. He has spent the entire season on the Colts' practice squad. He had never played organized football prior to joining the Colts.
The Colts also promoted offensive tackle Xavier Nixon, who was signed off the Washington Redskins practice squad earlier this season. He played college ball at the University of Florida.