Mel Kiper Jr. breaks down his most recent NFL mock draft and why DE Joey Bosa fell to No. 6 and OT Laremy Tunsil is now his projected No. 1 overall pick. (2:34)

One thing I always need to remind myself about the draft: You can't overstate your perception of immediate needs. That's because while teams do factor in where the roster needs to be deeper and where clear holes exist, nobody assumes that even the top picks in the draft are going to just come in and plug holes from day one. The other reason I mention that is because teams are about to set off addressing needs in free agency, going after experienced players with actual NFL track records. Many of the best teams are able to largely bypass the free-agency process, but overall, it does allow teams to target needs and make the draft more about taking the best player at every turn -- which is how evaluators prefer to approach things.

So keep that in mind as you look through this second mock draft of the season. Need matters, but in many cases, it also will be something that changes between now and the end of April.

A player with an asterisk next to his name has a year of eligibility remaining. Two asterisks implies two years.

*Laremy Tunsil, OT, Ole Miss

The No. 1 pick in the 2016 NFL draft could end up being directly tied to the No. 2 pick in the 2015 NFL draft. In short: The Titans have no choice but to improve their offensive line and do whatever they can to make sure Marcus Mariota is on the field for more than the 12 games he played as a rookie. Getting the offensive lineman with the highest upside in the draft is a good place to start.

Carson Wentz, QB, North Dakota State

We still have a couple of months to debate whether this will be Wentz or Jared Goff. But remember there's also the distinct possibility that Hue Jackson and the new front office aggressively pursue another QB in the trade market. I note that because regardless of whether the Browns draft a QB in this spot, it's almost certainly not their preference to start him in Week 1.

DeForest Buckner, DE, Oregon

If Tunsil is still available here, the Chargers would have a tough time passing on him, given the mess that has been their offensive line over the past few seasons. Buckner and Joey Bosa are going to grade out similarly, so it's more about preference and fit. That said, Buckner fits pretty much everywhere.