Ballard might not be finished adding to the lines in this draft. There are some good prospects still available. Andrew Brown (DT), RJ Mcintosh (DT), Bilal Nichols (DT), Brett Toth (OT), Tyrell Crosby (OT/G), and Tony Adams (G)
Tremon Smith is not as well known but he is a CB that I think fits the profile of what the Colts want at that position. He has length and ball skills.
Also, don't forget about Shaquen Griffin. Yes, I know he doesn't have a left hand but the guy can play. I think if a team is going to draft him the Colts are a possibility. He has speed and character which are two things Ballard has said over and over again that he wants.