In my opinion the real answer to your question of whether Manziel, or any rookie QB for that matter, can be the next Manning or Brees or whomever after suffering from poor performance early on is if they are intelligent enough, committed enough, and have the physical ability to learn and make the necessary adjustments throughout their career. I dont question Manziel's intelligence (wonderlick, etc), I have slight concerns regarding his physical ability (height), and I'm cautiously optomistic that the perception of his off-field committment doesn't match his true committment to getting better. Will that demonstrate itself over the next week weeks? Hopefully to the coaching staff it will, but it may not translate directly to what we see on Sundays just yet. I wouldn't feel comfortable writing off a 22 year old QB with a nice pedigree after 3 games but I think I'd have a much better indication on their ability to improve after an off-season of prepartion as starter and a few games. But, alas....I dont get paid to make those decisions
I'd feel better about the chances of him improving to the Eli Manning level (which if he can get to that level would be better than anything we've seen in Cleveland in years) if he could show just a few flashes of being able to compete at this level. He showed nothing at all on Sunday. Hopefully that was an aberration and we'll see how he recovers this week. Another performance like this past one and it doesn't bode well for his future in the NFL.