Fantasy: Super deep sleepers for 2017

Even with fantasy owners entering their drafts more prepared than ever, there are still players who slip through the cracks. Last year in this space, we mentioned names like Tyrell Williams and J.J. Nelson, both of whom emerged as fantasy starters at some point in the year.

In a continued effort to shine a light on the unnoticed or outright ignored, we've once again built a list of players going undrafted who are candidates to become fantasy relevant this season.

Related: 8 bounce-back candidates to target

Average draft position (ADP) data courtesy of FantasyPros and is based on 12-team leagues with standard scoring.

Cody Kessler, QB, Browns

Quietly efficient as a rookie despite lacking receiving weapons, Kessler is in line to start for the Browns even after the team spent a second-round pick on DeShone Kizer. Kessler probably won't ever be a fantasy QB1, but he has the chance to produce the sort of stats that Sam Bradford and Alex Smith do. In leagues that start two quarterbacks, he's a potential starter who can be had very late in fantasy drafts.

Overachiever Potential: ★★★★☆
ADP: Undrafted

Kerwynn Williams, RB, Cardinals

The Cardinals didn't add a running back this offseason until selecting speedster T.J. Logan in the fifth round, strongly suggesting they have faith in Williams' ability. He has only 98 career rushing attempts, but has taken them for 5.6 yards per carry. If David Johnson were to get hurt, Williams would likely be next in line for carries.

Overachiever Potential: ★★★★☆
ADP: Undrafted

De'Angelo Henderson, RB, Broncos

Jamaal Charles isn't a lock to make the Broncos' final roster, and starter C.J. Anderson, who's coming back from a foot injury, is looking a little out of shape. That leaves Devontae Booker, who was a major disappointment when called upon as a rookie last year. Henderson will likely start the season fourth on the depth chart, but suffice it to say, the Broncos' backfield could be cracked wide open at any minute. With solid pass-catching skills, Henderson's early contributions could come as a third-down back if Charles falters.

Overachiever Potential: ★★★☆☆
ADP: ​Undrafted

Elijah Hood, RB, Raiders

First impressions are important, and Hood apparently impressed the coaching staff at the Raiders' rookie camp. However, he still has a long way to go if he's going to see the field on offense in 2017. If 31-year-old Marshawn Lynch were to get hurt in his return from a year off, Hood would be best suited to take over as a true lead back. Jalen Richard and DeAndre Washington are quality complementary pieces, but neither has excelled behind Oakland's above-average line. Hood could give the team that physical running style, but he might still be a year away from landing on the fantasy radar.

Overachiever Potential: ★★★☆☆
ADP: Undrafted

Paul Richardson, WR, Seahawks

Richardson's NFL career has started slow, as he's played in a run-first offense behind established veterans. That trend might be about to change this season, after he showed well filling in for an injured Tyler Lockett late last year. Jermaine Kearse's involvement in the offense was reduced significantly in 2016, and Richardson will certainly challenge him for snaps moving forward. With Russell Wilson throwing passes in Seattle, playing time is the only thing holding Richardson back.

Overachiever Potential: ★★★★☆
ADP: ​Undrafted

Chad Williams, WR, Cardinals

Arizona may have reached a little to draft the small-school prospect Williams in the third round, but that's because it clearly has high aspirations for him. The Cardinals believe Williams can be Larry Fitzgerald's successor - a role they might need to fill much sooner than they hope, considering Fitzgerald will soon turn 34. Even if Fitzgerald sticks around, there is opportunity in this passing attack with Michael Floyd gone and John Brown still facing questions about his health.

Overachiever Potential: ★★★★☆
ADP: ​Undrafted

Aldrick Robinson, WR, 49ers

Robinson doesn't have much production on his NFL resume, but the 28-year-old has an excellent opportunity to change that in 2017. After bouncing around between the Redskins, Ravens, and Falcons, he'll finally have a chance to compete for a starting role with the 49ers. The veteran followed Kyle Shanahan to San Francisco, where he'll have the advantage of playing in a familiar system. With no proven options in the receiving corps outside of Pierre Garcon, Robinson could be this year's Taylor Gabriel.

Overachiever Potential: ★★★★☆
ADP: ​Undrafted

Erik Swoope, TE, Colts

With Dwayne Allen now in New England, Swoope steps into the Colts' No. 2 tight end spot behind Jack Doyle. The former basketball player flashed an ability to make plays downfield in limited action last season, averaging 19.8 yards per reception. He'll continue to see his role grow, and, if Doyle were to miss time with an injury, could emerge as a low-end starter in fantasy.

Overachiever Potential: ★★★★★
ADP: Undrafted

More from this series

• Breakouts to target
• Busts to avoid
• Sleepers to steal
• Risky picks to gamble on
• Bounce-back candidates
• Players who will lead you to a title

(Photos courtesy: Action Images)