Unearthing hidden gems is an exercise every fantasy footballer aspires to. With pickaxe in hand, I dig deep in an attempt to discover truly shocking outcomes. Below is a list of players available after pick No. 100 in average PPR drafts who could greatly exceed expectations this fall.Jonah Coleman, Broncos (RB46, 149.45 ADP)Readers familiar with this sometimes misguided analyst are having Royce Freeman and Montee Ball flashbacks. Admittedly, this scribe has waxed lovingly about way too many Broncos backs over the years.Screw it. I’m dipping my pail again in what’s sure to be a polluted well.All kidding aside, Coleman is a fascinating bench target. A versatile bruiser with a beer-keg build (5-foot-8, 228 pounds), he possesses the skills necessary to directly back up either J.K. Dobbins or RJ Harvey. Last year with the Washington Huskies, the fourth-round pick amassed an impressive 3.58 yards after contact per attempt, 31 receptions and a 23.6% missed tackle rate. An established zone runner, he averaged a robust 5.68 yards per carry during his collegiate career. In other words, he’s an excellent fit in Sean Payton’s ground system.Early on, bank on Coleman receiving roughly 4-7 touches per game. That’s unexciting for shallow leaguers, but in more challenging formats with sizable bench spots, he’s worth a stash. His contact balance, patience, one-cut burst and reliable hands are quite appealing. Frankly, he’s a Dobbins knee tweak away from posting RB2-level numbers in 12-team and deeper formats. Keep in mind, the Broncos have arguably the best offensive line in the NFL. Giddy up.Tank Bisby, Eagles (RB50, 146.6 ADP)For those who like handcuffs for their lead back, Saquon Barkley’s sidekick is a must draft. Independent of that strategy, he’s also a superb stash in 12-team and deeper formats.Last year in limited appearances, Bigsby balled. He ranked top-five in yards created per touch and yards after contact per attempt. Most outstandingly, he forced a missed tackle on 28.3 percent of his rush attempts. His 5.9 yards per touch also opened eyes.Barkley is the undeniable RB1 in the City of Brotherly Shove, but his horrendous advanced metrics profile paints a grim picture. If he slumps early, it’s possible Bigsby siphons away a regular 6-8 touches per game at some point. If that unfolds, he would have some FLEX appeal in challenging formats.