Lito Sheppard to the Vikes - free agents affect draft strategies

Today the Vikes signed Lito Sheppard from the Jets. Sheppard didn't perform like the Jets expected and they traded for Antonio Cromartie. I had the Vikes taking a corner in the first round but signing Sheppard signals that the Vikes won't take a corner in the first round. It would be unusual to sign a corner to be a nickelback and draft a player you expect to start.