My wish list for the Titans’ first three draft picks: Defensive end. Defensive tackle. Defensive back. I’ll leave it up to Ruston Webster and Mike Munchak to work out the details from there. With three picks in the top 70 — and four in the top 97, thanks to a compensatory selection — the Titans have a chance to upgrade their defense. OK, upgrading this defense shouldn’t be difficult. The Titans had the worst defense in the NFL last season in terms of points allowed. They didn’t stop the run or the pass. They couldn’t get off the field on third down. And yet, as active as the Titans have been in free agency this offseason, they’ve done comparatively little to address their defensive shortcomings. On that side of the ball, their top acquisition is George Wilson, who fills a major need at strong safety. Otherwise, the team has focused most of its attention on quick fixes for the offense. With that in mind, this should be a draft that targets defensive players early and often. The Titans need difference-making players, particularly up front. A pass rush that was almost nonexistent last season must get better. With that in mind, it will be interesting to see what kind of impact Gregg Williams has in this draft. When Williams was the Titans’ defensive coordinator from 1997 to 2000, his words carried extra wait on draft day. During that period, the Titans picked impact players such as Jevon Kearse, Keith Bulluck and Samari Rolle in the first two rounds. The higher-ups need to listen to Williams because recent drafts simply haven’t lived up to expectations, particularly on defense.