The start of the combine tomorrow marks the beginning of a major ramp-up of interest in the 2018 NFL draft. So as we prepare to ramp up the draft mania, let’s first take a brief look back.

The prevailing wisdom around the NFL is that it takes three seasons for you to truly know what you have/had in a draft class. While day-of draft grades make good headlines, it’s impossible to know what sort of value you got in those players before they’ve spent significant time in the NFL game.

The 2015 draft class has now had three full seasons in the NFL. In hindsight, it certainly was not one of former GM Ted Thompson’s better drafts.

Of the eight players taken by the Packers in that draft, six are still on the team—both compensatory picks Christian Ringo and Kennard Backman have since left the team. Ringo is now a member of the Detroit Lions, and Backman has not stuck with a roster since his rookie season in Green Bay, spending some time in camp and on practice squads with the Lions and the New England Patriots.

The other six have provided mixed results at best in their time on the field so far.

My grades for each pick take a variety of factors into consideration: expectations out of a pick taken at that point in the draft, quality of play produced, and expectations out of the player moving forward.

Here’s a brief look.

Round 1, #30 Overall: Damarious Randall, DB, Arizona State University

The mercurial Randall has seen some high highs and very low lows in his three years as a Packer so far. During his rookie year, he flashed some real potential as a playmaker and potential shutdown corner, but like almost all rookie defensive backs, made plenty of mistakes that simply cannot happen on a football field. Nevertheless, he made a couple game-saving plays and demonstrated skill befitting that lf a first-round selection.

2016 was an entirely different story. Randall spent much of the season playing through injury and missed six games, five of which came in a row after undergoing surgery. The time he did spent on the field was marred by him being routinely torched by opposing quarterbacks. He did have a fine game against Seattle late in the season, during which he nabbed two of his three interceptions on the season and had a couple other nice pass defenses, but overall it was an extremely forgettable year.

2017 had an auspicious start for Randall as well. He routinely drew the ire of Packers fans by being out of position and giving up big plays. But after he was benched by Mike McCarthy against Chicago, he quietly turned around his season, becoming one of the Packers’ more reliable defenders and finishing the season with four interceptions, nine pass deflections and a touchdown in 14 games.

The massive swings in Randall’s game play in his first three years make it difficult for him to earn a high grade, but if the momentum he picked up in the latter half of 2017 carries over into 2018, he could very well earn a lucrative contract extension and be a long-term member of the Packers, which would serve to boost this grade up a couple notches.

Grade: C+

Round 2, #62 Overall: Quinten Rollins, DB, Miami (OH)

Like Randall, Rollins had a solid rookie season, and there was some legitimate debate among Packers fans and analysts about which of the two had a brighter future at the cornerback slot. The Packers were so confident in the performance of Rollins and Randall that Casey Hayward was deemed expendable after the 2015 season.

Rollins finished his rookie season with six pass deflections, a pair of interceptions and a touchdown. Like Randall, there were some clear rookie moments. He also didn’t demonstrate the same sort of speed and playmaking ability that Randall flashed, but was in general a solid depth player who had some potential as a nickel back moving forward.

But when the Packers lost Hayward to free agency and Sam Shields to a career ending injury, Rollins was forced into the spotlight alongside Randall. And it wasn’t pretty.

Rollins’ relative lack of speed and his inexperience, combined with a slew of injuries, made him a liability in the backfield in 2016. Then in 2017, Rollins played in just six games, starting one, once again as a result of injuries, and the limited time he did see on the field was not promising.

2018 is a contract year for Rollins, and based on the last couple years, the smart money is he will not be back in 2019.

Grade: D+

Round 3, #94 Overall: Ty Montgomery, WR, Stanford

The jury is still very much out on Montgomery, who has flashed some remarkable talent but simply has not been able to stay on the field in his first three seasons.

Montgomery has provided some value to the Packers as a utility receiver and runner in a similar vein to Randall Cobb, but has yet to develop the same sort of rapport with Aaron Rodgers that Cobb has. This is likely due to a lack of playing time caused by bad luck with injuries. Montgomery missed 10 games in his rookie season, then after missing just one in 2016 he came back to miss another eight in 2017, when he had been tabbed at the beginning of the year to serve as the Packers’ starting running back.

As a runner, Montgomery showed surprising patience and burst in 2016, but often was caught stuttering behind the line and failed to gain much momentum as a back in 2017. He is a strong, physical player, but not a natural blocker and could not be relied on in blitz pickup the same way a guy like Aaron Ripkowski could.

As a receiver, Montgomery has shown value as a slot player and possession receiver, including a breakout game in 2016 in which he had 10 receptions. But he has not proven to be the kind of player who can stretch the field through the air—his long in three seasons is 31, and his career yards per catch average is just 8.0.

Despite being used all over the field in three seasons, Montgomery still has a very ill-defined role on the team heading into 2018. There’s a chance he can make himself valuable to the team this year, but I would bet on him being part of a receiver exodus after this season is over.

Grade: C

Round 4, #129 Overall: Jake Ryan, ILB, Michigan

Ryan has been more consistent than the previous draftees mentioned on this list, though he hasn’t necessarily had the same highs that some of them have shown. With a 4.65 40 time, Ryan isn’t exactly going to chase most guys down from behind, and he has not typically been reliable in coverage over the middle of the field.  Leave him in single coverage on an athletic tight end, and odds are you’re not going to like the results.

Ryan has been a steady presence on the field, missing two games in each of his first two season and one in 2017. He is a good contributor in the run defense, but cannot be counted on as a pass rusher or as an every-down defensive player. In him, the Packers have a guy who would be an excellent depth and rotational player, but should not be counted on to carry a major load as a starter.

Grade: C

Round 5, #147 Overall: Brett Hundley, QB, UCLA

Oh boy, here we go, Hundley fans.

As a rookie, Hundley barely saw the field, attempting just 10 passes in the regular season. However, the Packers saw enough out of his impressive preseason performances that year to allow Scott Tolzien to walk in the 2016 offseason, giving Hundley the top backup duties. In 2016, Hundley saw action in four games, completing just two of 10 passes for 17 yards and throwing one interception.

We all know what went down in 2017. Rodgers was hurt against the Vikings, and Hundley played significant time in 11 games, starting nine. During that time, he showed an inability to make plays downfield, notching a dismal 5.8 yards per attempt. He threw nine touchdowns (none at home) in 11 games to 12 interceptions, and finished with a 70.6 rating.

Hundley made several clutch plays during his run as a starter that allowed the Packers to at least tread water in hopes that Aaron Rodgers could make a miraculous recovery to push the team into the playoffs. One that sticks out is his beautiful game winner to Davante Adams in the second Bears game.

But on the whole, Hundley’s year was miserable. He went from potentially being trade bait for a third or fourth round pick to a guy that no GM in his right mind would give up a pick or player of any sort for.

In fairness to Hundley, he was a fifth round pick who was asked to step in and take the place of the world’s best quarterback, a guy who makes every aspect of the game look easy. He probably never should have been put into this position in the first place—a fault that lies with Ted Thompson and the front office for not making a move to get a legitimate veteran backup in to at least compete with him. Heck, the Vikings managed to have three competent backups on their roster this year!

But if we are judging the level of play on the field alone, Hundley failed to meet the standard of play one would ask for out of a reasonably competent backup quarterback, let alone a reasonably competent starter. He likely played himself out of Green Bay as soon as his contract expires, and if the team enters the season with him as their primary backup quarterback again without giving him any legitimate competition, then it deserves what it gets.

Grade: D+

Round 6, #206 Overall: Aaron Ripkowski, FB, Oklahoma

In his first three seasons, Ripkowski has been an extremely reliable replacement for John Kuhn at the fullback slot. Though the Packers do not use a traditional fullback as often as they once did, he clearly has Rodgers’ and McCarthy’s trust in pass protection situations, and has been a punishing presence as a lead blocker while also serving as a mostly reliable runner in short yardage situations.

There’s no reason to think Rip is going anywhere any time soon—he could (and should) be a regular presence in the Packers’ offense for years to come, as long as the team is interested in using a fullback, which makes him a great value pick in the late rounds.

Grade: A

Round 6 (comp), #210 Overall: Christian Ringo, DE, Louisiana-Lafayette

Ringo spent two years with the Packers, but did not play a single game his rookie year, spending the season on the practice squad. His second year he suited up for eight games, made two tackles and forced a fumble.

Call this one a whiff, which often happens with these late-round comp picks.

Grade: N/A

Round 6 (comp), #213 Overall: Kennard Backman, TE, Alabama-Birmingham

Backman’s rookie year with Green Bay was the only year he spent on an NFL roster. He suited up for seven games, but did not register a single receiving statistic. He has bounced around practice squads since.

Like with Ringo, I’ll avoid giving the pick an “F” for the simple fact that these very late-draft picks are often complete flyer picks that cannot be always be expected to turn into long-term contributors. But also like Ringo, this was a definite whiff by Thompson.

Grade: N/A