 Grimes completed the 2013 season with a total of 60 combined tackles (52 solo), 17 passes defensed, four interceptions, and a touchdown in 16 games and 16 starts.He ranked as the second best cornerback by Pro Football Focus and was ranked as the 95th best player by his peers on the NFL Top 100 Players of 2014.On March 3, 2014, the Miami Dolphins signed Grimes to a four-year, $32 million contract that includes $16 million guaranteed and a signing bonus of $6 million.