Marcus Mariota highlights Tennessee Titans' 2015 draft class

Marcus Mariota has had a promising rookie season so far -- throwing for 1,610 yards on 131 attempts with 13 touchdowns. Christopher Hanewinckel/USA TODAY Sports

The Tennessee Titans had nine selections in the 2015 draft. Here's a closer look at how their picks have contributed:

2015 draft class:

Starters: Marcus Mariota (7 starts), Jeremiah Poutasi (7), Andy Gallik (3), Dorial Green-Beckham (2).

On the cusp: Green-Beckham had by far his most productive game in Week 9 in New Orleans. The Titans are likely to look to him more and more now that Mike Mularkey is the interim coach. Green-Beckham could take a starting spot from Harry Douglas or Justin Hunter, particularly if the Titans open in three-wide.

Undrafted free agents they like: Cody Riggs is a gritty cornerback who has done well with limited chances and can play a good deal on special teams. With Jason McCourty out for the season and Perrish Cox and Blidi Wreh-Wilson dealing with hamstring injuries, Riggs and B.W. Webb will both continue to be called on to help the defense.

My take on class: Mariota has shown the potential to be great, and the class is a big win if that turns out to be the case, no matter what else happens. Green-Beckham needs time, but the Titans need him to produce more like the way he did against the Saints. It's a disappointment Poutasi can't be a starter as a rookie third-rounder. Fowler remains a confounding pick for how small the role of a fourth-round fullback is. Angelo Blackson is already contributing to a good defensive line.

Mel Kiper’s take on class: Mariota has completed nearly 66 percent of his passes and has thrown for 13 TDs against just five INTs. No, he won't pick a good defense apart at this point, but this is what you hope a rookie QB looks like. If he's healthy, they have their guy. Poutasi and Gallik have been asked to step in, with mixed results. Poutasi has struggled. Fowler is a favorite of mine and has seen time. Dorial Green-Beckham shows incredible potential in flashes, but is he an every-down guy?