Defenseive players are for the most part a crapshoot. If you're looking for upside, go with the player who has the most interceptions. If you're looking for the safest play, then figure out which player has the most tackles. Since these are defensive backs, I would assume that the one with the most tackles probably is on a team with a poor rush defense. I don't know if that accurately applies in this case, you can look up the stats on nfl.com I'd do it myself, but honestly, I'm very tired now. I'll try tomorrow and post it here if I get a chance.