Per Ian Rapoport of NFL Media, on April 1st, the Arizona Cardinals brought veteran cornerbacks Morris Claiborne and Traimaine Brock to the facility for meetings.
After the addition of Robert Alford before free agency, the Arizona Cardinals were expected to stand pat at the cornerback group and instead likely draft a nickel cornerback in late April. However, Steve Keim has been adamant about rebuilding the secondary into a deep one with veteran talent, therefore the interesting in Claiborne and Brock makes sense.
Claiborne would be the bigger addition of the two.