Former Chiefs and 49ers cornerback Kenneth Acker visited the Colts on Tuesday, Field Yates of ESPN.com tweets. Acker could help to provide support in what is a very thin positional group. 
The Colts re-signed corner Pierre Desir this season, but they watched Rashaan Melvin leave in free agency to join up with the Raiders. Replacing Melvin won’t be easy. The former undrafted free agent started in all ten of his games last season and graded out as a top 20 cornerback, per the advanced metrics at Pro Football Focus. Acker probably would not profile a starter for Indianapolis, but he could offer depth from the bench. The Seahawks also have some interest in him.
In other Colts news, GM Chris Ballard recently discussed the team’s offseason, which has not been as headline-grabbing as other teams in the AFC.