The Green Bay Packers had the NFL’s top-scoring offense last season. With every starting player back for 2015, the pieces are in place to have another fast-paced, explosive group. A team can only be as good as the individuals who comprise it, though.

With that in mind, this series examines the Packers’ roster and lists the 10 most important players on offense and defense.

If you missed it later last week, numbers 10 through six on offense were named. Today, it’s the top five. In the coming days, we’ll focus on the 10 most important players on Green Bay’s defense.

No. 5: David Bakhtiari, left tackle

Age/experience: 23 / 3rd NFL season

Stats last season: 1,171 snaps, seven sacks allowed

Expectations for 2015: Through the first two seasons of David Bakhtiari’s career, the Packers have gotten more than they could have hoped for when drafting him in the fourth round in 2013. He stepped in immediately as a rookie for an injured Bryan Bulaga and has started at left tackle ever since. Bakhtiari showed quality improvement in his second year, especially in pass protection. However, his run-blocking still remains a significant weakness. Playing next to Josh Sitton gives him a great advantage, and it’s time for Bakhtiari to step up in that area. For Bakhtiari to truly establish himself in the NFL, he’ll have to work his way into the conversation for being among the top-15 left tackles. He’s not there yet, but a big 2015 season could do that for him.

Injury history/position depth: Bakhtiari’s development has been aided by his ability to stay healthy. He knows firsthand from the Bulaga situation how an injury can change two players’ career paths. If Bakhtiari misses any action, it seems likely that head coach Mike McCarthy would slide Bulaga from right to left tackle, then insert Don Barclay at right tackle.

No. 4: Randall Cobb, wide receiver

Age/experience: 24 / 5th NFL season

Stats last season: 1,076 snaps, 106 receptions on 147 targets for 1,465 yards and 13 touchdowns, eight dropped passes and 13 rushing attempts for 42 yards

Expectations for 2015: Randall Cobb had an opportunity this offseason to earn even more money, but the four-year, $40 million contract he signed with the Packers will still bring about plenty of increased expectations. If Cobb puts up the same numbers he did last season, Green Bay would be getting excellent value. Cobb was 11th in the NFL in receiving yards, ninth in catches and fourth in touchdown receptions. It will be interesting to watch how much of Cobb’s time is spent in the slot and how much is spent as an outside receiver.

Injury history/position depth: With the exception of a fractured fibula in 2013 costing him 10 games, Cobb has mostly been healthy in his career. The Packers don’t have another receiver with Cobb’s versatility who can simply step in and replace him. Some combination of Davante Adams, Jeff Janis, Jared Abbrederis and Ty Montgomery would have to do their best to make up for the production.

No. 3: Jordy Nelson, wide receiver

Age/experience: 30 / 8th NFL season

Stats last season: 1,121 snaps, 105 receptions on 164 targets for 1,612 yards and 13 touchdowns, plus 10 dropped passes

Expectations for 2015: Jordy Nelson faded a bit down the stretch last season, struggling Week 16 in Buffalo and in the divisional round win over Dallas. Still, it’s difficult for any receiver to do much better overall than Nelson did in 2014. He was second in the NFL in touchdown catches, fourth in yards and seventh in catches. Nelson is 30 years old now, so he’s nearing the age when some skill-position players begin to slow down. With his four-year, $39 million extension just beginning, Nelson needs to continue delivering in order for the Packers offense to remain dominant.

Injury history/position depth: Nelson has only missed seven games due to injury in his first seven NFL seasons. If injuries keep him off the field for a stretch of time like they did in 2012, Adams will need to be ready to elevate from No. 3 receiver to No. 2. It would also require one of the unproven backups (Janis, Abbrederis, Montgomery) to play a significant amount of snaps. Green Bay is unlikely to be as fortunate as it was last season with neither Nelson or Cobb being sidelined with injuries.

No. 2: Eddie Lacy, running back

Age/experience: 25 / 3rd NFL season

Stats last season: 788 snaps; 286 rushing attempts for 1,313 yards and nine touchdowns; 43 receptions on 54 targets for 437 yards and four touchdowns; and one dropped pass

Expectations for 2015: It took Eddie Lacy two seasons to emerge as one of the NFL’s top five running backs. His intimidating running style has given the Packers offense a threat in the backfield that was lacking for many years. No longer can defensive coordinators have their entire gameplan be about stopping Green Bay’s passing attack. Lacy still has the potential to get better, too. He’s already caught 77 passes in his career, and it became a bigger part of his game during the second half of 2014. It’s realistic that Lacy could have 1,200 rushing yards and 500 receiving yards this upcoming season. That would put him in rare territory.

Injury history/position depth: Despite his desire to punish oncoming tacklers, Lacy has remained mostly healthy in his career. It’s been a concerted effort from McCarthy to keep Lacy’s touches (and overall snaps) at a relatively low amount, especially early in the season. The Packers don’t have much depth at running back, with James Starks the only experienced player behind Lacy. Fighting for the No. 3 job will be second-year undrafted running back Rajion Neal and undrafted rookie John Crockett.

No. 1: Aaron Rodgers, quarterback

Age/experience: 31 / 11th NFL season

Stats last season: Completed 384 of 589 passing attempts for 4,875 yards, with 42 touchdowns and seven interceptions

Expectations for 2015: Gee, what a surprise to see Aaron Rodgers at number one, right? For the most part, the Packers can go as far as Rodgers is able to take them. He’s by no means a one-man show, but his importance to Green Bay’s success can’t be overstated. Rodgers is past the unofficial midway point of his career, but he still has a few years left in his prime. Adding another league Most Valuable Player award last season is further proof that Rodgers is at the top of his game. The offense didn’t lose any of its starters in the offseason, so Rodgers has all of his weapons to work with. It’s reasonable to expect Rodgers to lead the Packers to once again having the NFL’s top-scoring offense. Plus, another MVP trophy would tie him with Brett Favre.

Injury history/position depth: Rodgers had the fractured collarbone that sidelined him for seven games in 2013, and he played through a left calf injury towards the end of last season. Green Bay would like to hope its prepared for a potential Rodgers injury by having Scott Tolzien as the No. 2 quarterback. Clearly, no one can replace Rodgers’ production. But keeping the Packers afloat in the event of a Rodgers injury is the key, and that didn’t happen two years ago when they went 2-5-1 without him. Rookie Brett Hundley is unlikely to surpass Tolzien for the top backup job this season.