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Packers Undrafted Free Agents: Offensive signings bring plenty of college production

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Who are the nine offensive players reportedly signing with Green Bay on undrafted free agent deals?

Rob Kinnan-USA TODAY Sports

The Green Bay Packers have yet to formally announce their undrafted free agent signings following the 2016 NFL Draft class, but reports have been released and confirmations have been learned about 21 players having signed (or agreed to sign) their contracts. This week, we'll try to get to know those players a little better before they arrive in Green Bay for rookie minicamp, which begins on Friday.

In order to do that, we're breaking up the signees into a few groups to get a feel for what each of them brings to the table. Following that, we will provide our predictions for which players are most likely to make the Packers' 53-man roster following training camp.

Today, we begin by looking at the nine players on offense who have been reported to be signing with the Packers.

Note that most times and results are from Pro Day measurements, as reported by NFL Draft Scout. If results are from the 2016 NFL Scouting Combine, they are designated with an asterisk.

Joe Callahan, quarterback, Wesley College

Height: 6' 1-1/8"
Weight: 216 lbs.

40 time 10-yd split Bench Vertical Broad Shuttle 3-Cone
4.98 1.78 18 33" 8'11" 4.70 7.47
College Stats
Year Comp Att Comp % Yds TD INT Efficiency
2013 269 461 58.4 3,599 29 16 137.7
2014 300 463 64.8 4,190 46 10 169.3
2015 346 496 69.8 5,063 55 12 187.3

Callahan visited the Packers prior to the NFL Draft, so it is no surprise that he ended up signing in Green Bay. At the Division III level, he put up the impressive numbers you can see above, steadily improving in almost every category. He was profiled by the Milwaukee Journal-Sentinel after that visit, and each of the last three years his team lost to D-III power Mount Union in that division's playoffs.

Certainly, Callahan is a developmental prospect, but one who should be in tight competition with third-stringer Ryan Williams throughout the summer for a spot on the practice squad.

Don Jackson, running back, Nevada

Height: 5' 10"
Weight: 205 lbs

40 time 10-yd split Bench Vertical Broad Shuttle 3-Cone
4.50 1.59 15 38.5" 9'10" 4.34 7.09
College Stats
Year Rush Att Rush Yds Y/A Rush TD Rec Rec Yds Y/R Rec TD
2013 83 332 4.0 4 3 35 11.7 0
2014 216 957 4.4 7 13 157 12.1 1
2015 228 1,079 4.7 8 7 77 11.0 1

Jackson is a moderately-sized running back with good but not great testing numbers across the board. He was also the workhorse for Nevada the past two years, gaining solid but not explosive rushing numbers. Sense a theme here?

What Jackson may provide, though, is an intangible quality. This piece from Packer Report breaks down his background, fraught with violence, academic issues, and drugs. Since his youth, he has turned his life around and is now an easy man to root for as he tries to get his NFL career underway.

Brandon Burks, running back, Troy

Height: 5' 8-5/8"
Weight: 208 lbs

40 time 10-yd split Bench Vertical Broad Shuttle 3-Cone
4.56 1.52 24 37" 10' 4.18 6.88
College Stats
Year Rush Att Rush Yds Y/A Rush TD Rec Rec Yds Y/R Rec TD
2013 133 664 5.0 2 36 188 5.27 0
2014 96 584 6.1 3 23 181 7.9 1
2015 201 1,005 5.0 7 29 304 10.5 2

Trying to project an undrafted free agent player to someone like Darren Sproles is probably silly, but the physical comparison between Burks and the long-time receiving back and special-teams contributor seems somewhat apt. Both are small in stature (Burks is bigger than Sproles' 5'6" and 187), and Sproles is a bit faster (4.46 40) but both players matched with a 1.52-second split. Burks has a little more explosiveness in him though - his vertical was four inches greater and his broad jump over a foot longer than Sproles.

Perhaps, however, Burks compares better to another former Trojan and former Packer: DuJuan Harris. However, while Harris had a remarkable first step (1.44 split) and equaled or slightly exceeded Burks' leaps, he lagged behind Burks in both agility drills.

Clearly, Burks was used as a receiver heavily at Troy, and he returned some kicks in his first year or two as well, adding a bit more to his value.

Geronimo Allison, wide receiver, Illinois

Height: 6' 3-1/4"
Weight: 196 lbs.

40 time 10-yd split Bench Vertical Broad Shuttle 3-Cone
4.67*/4.56 1.65 n/a 33"*/34.5" 10'7"* 4.28* 7.40*
College Stats
Year Rec Rec Yds Y/R Rec TD
2014 41 598 14.6 5
2015 65 882 13.6 3

Allison is one of two undrafted signees from a Power-Five conference, playing in the Big Ten. He led the Illini in receiving a year ago and made honorable mention all-conference. While not a particularly fast or quick receiver, Allison does possess a long, lean frame and was a solid possession receiver. He'll need to bulk up at the next level, but he has by far the best receiving production of any of the Packers' wideouts signed as undrafted players.

Dennis Parks, wide receiver, Rice

Height: 6' 1-1/2"
Weight: 201 lbs.

40 time 10-yd split Bench Vertical Broad Shuttle 3-Cone
4.61 1.52 10 32.5" 10'2" 4.48 7.44
College Stats
Year Rec Rec Yds Y/R Rec TD
2012 7 112 16.1 1
2013 29 508 17.5 3
2014 29 389 13.4 1
2015 33 498 15.1 3

Like Allison, Parks has good size but just average speed and agility. He does have a quick burst, though, as his 10-yard split indicates, and he was a consistent producer for the Owls as a member of a deep receiving group that saw no player catch more than 40 passes in 2015.

Devonte Robinson, wide receiver, Utah State

Height: 6' 1-1/4"
Weight: 188 lbs.

40 time 10-yd split Bench Vertical Broad Shuttle 3-Cone
4.33 1.56 n/a 38" 10'8" 4.38 7.33
College Stats
Year Rec Rec Yds Y/R Rec TD
2014 24 226 9.4 2
2015 20 326 16.3 2

Where Allison and Parks fail to impress with their deep speed, that is Robinson's greatest strength - he does not have elite acceleration, but once up to speed, he is a blur. He does not have substantial production to rely on in order to make his case, so he will certainly be called upon to show that he can do more than just run go routes at the next level if he is to have a shot at the 53-man roster.

Herb Waters, wide receiver, Miami (FL)

Height: 5' 11-3/4"
Weight: 188 lbs.

40 time 10-yd split Bench Vertical Broad Shuttle 3-Cone
4.51 1.51 14 38.5" 10'1" 4.10 6.73
College Stats
Year Rec Rec Yds Y/R Rec TD
2012 10 227 22.7 2
2013 28 406 14.5 5
2014 20 277 13.9 1
2015 41 624 15.2 1

Waters, like Parks, was part of a multi-faceted passing attack his final year in college. He finished third on the team in receptions and yards, but all of those top three had between 41-52 receptions and 624-695 yards. He will have some familiarity with QB Ryan Williams, however, as the passer spent time with him in Miami.

Waters is more of a quick-twitch athlete than the other receivers brought in on free agent contracts, and as such it is likely that he will need to make his mark as a slot receiver.

David Grinnage, tight end, North Carolina State

Height: 6' 5-1/4"
Weight: 248 lbs.

40 time 10-yd split Bench Vertical Broad Shuttle 3-Cone
4.90*/4.81 1.70*/1.64 7 29.5" 8'10"*/9'3" 4.74 7.56
College Stats
Year Rec Rec Yds Y/R Rec TD
2013 15 150 10.0 1
2014 27 358 13.3 5
2015 25 290 11.6 3

Playing in a run-heavy offense for the Wolfpack did not do much for Grinnage's receiving stats, but he certainly developed as a blocker. In fact, he might come into OTAs as the best blocking tight end on the roster by default, given the players ahead of him on the depth chart. He should be able to compete for a spot on special teams as well early on.

Josh James, offensive tackle, Carroll (Montana) College

Height: 6' 5-1/8"
Weight: 315 lbs.

40 time 10-yd split Bench Vertical Broad Shuttle 3-Cone
5.34 1.93 26 n/a n/a n/a n/a

James played NAIA ball, which makes him a long-term project for the Packers. However, he has a good-sized frame that might be suitable for a move inside to guard. He was an NAIA All-American as a senior and started at left tackle for all four years at Carroll.