Arch Manning's NFL Draft Prospects in Question After Mel Kiper Jr.'s Evaluation

• Mel Kiper Jr. has expressed frustration and difficulty in evaluating Arch Manning's NFL draft stock.
• Arch Manning's draft position has fallen significantly according to recent mock drafts.
• Texas quarterback Arch Manning has one year of eligibility remaining after the current season.
• Insiders suggest Manning might consider staying in college rather than entering the NFL draft.
• Recent quarterbacks who stayed in school offer lessons on the benefits and risks of Manning's decision.