The Green Bay Packers lost a couple of key pieces in Za'Darius Smith and Davante Adams during the offseason. As it currently stands, they are still working to replace those two guys.

The Packers' ability to pull off a trade helps them do just that in NFL.com's Chad Reuter's latest mock draft.

Reuter has the Packers moving up to No. 21 after trading their 28th overall pick to the New England Patriots. They then use that pick to select Purdue pass rusher George Karlaftis in hopes of bolstering the pass rush. Green Bay didn't have to trade its 22nd overall pick away, so it selected Ohio State wide receiver Chris Olave with that pick.

Reuter wrote the following in regard to the Karlaftis pick:

There will be many suitors for the Patriots' pick, and the Packers understand they can't just sit back at No. 22 and wait for the top players on their board to fall into their laps. Whether they pick a receiver at No. 21 or a strong edge rusher like Karlaftis, moving into this spot prevents others from jumping ahead of them.

And this is what Reuter wrote about Olave:

Trading Davante Adams and failing to re-sign Marquez Valdes-Scantling means there's a big hole on the Packers' roster. Olave's smooth speed fills part of that need, as will any acquired veteran free agents, pass-catchers selected later in this draft and, as I'm sure Green Bay hopes, last year's third-rounder, Amari Rodgers.

How much did the trade up to 21 cost the Packers?

Reuter doesn't specify how much the trade cost the Packers in his mock draft. That's a pretty big detail to leave out. Fortunately, we can obtain an idea of how much it could cost using the Rich Hill draft trade value chart.

Pick No. 21 is worth 261 points. Pick No. 28 is worth 209. Meaning, the Packers have 52 points to make up if they want to pull off the trade. Green Bay's third-round pick is only worth 42 points and we are talking about a first-round trade, here. Very rarely do we see teams move in the first without including their first and at least a second-rounder in the deal. Therefore, it's likely to cost them one of their second-round picks.

The Packers' have two second-rounders worth 106 points and 91 points, respectively. They could include either pick in the trade and pull it off. Brian Gutekunst may even be able to nab the Patriots' third- or fourth-round pick in the trade, as well. If he trades the No. 53 pick, he'll "overspend" around 50 points. Including New England's No. 85 or No. 127 pick, likely the latter, would be a plausible, solid move.

The Packers would have three picks in the fourth round if they were to nab the Patriots' fourth-round pick.

Both players fit well in Green Bay

Both players work well for the Packers and are good picks in this mock draft. Karlaftis would be a great rotational piece behind Rashan Gary and Preston Smith. He also gives the Packers financial flexibility in the future and he could possibly replace Smith, ensuring a smooth transition a la Gary/Z. Smith.

Olave is obviously a big get. He can easily become the Packers -and Aaron Rodgers- No. 1 weapon in the passing game and he has the tools to become a franchise receiver. Plus, it'll be nice to see the Packers finally draft a receiver in the first round, for once.

You can check out Reuter's full mock draft, here.

Featured image via Kirby Lee-USA TODAY Sports