Javon Patterson was the final pick for the Colts in the 2019 draft. He was picked after the Colts traded Hassan Ridgway for the 246th overall pick. It was a significant move for the team to make for a seventh round draft pick that is towards the bottom of the round.
Ridgeway was a player who always showed flashes of good play, but could never put it together on a consistent basis. It was frustrating to watch. Clearly, the Colts were tired of watching that, so they shipped him off in exchange for a 7th round pick.
As far as that pick is concerned, Patterson increases the depth along the offensive line.