Keeping Upton out of fear
"Only those who dare to fail greatly can ever achieve greatly." -Robert F. Kennedy
"Only those who risk going too far can possibly find out how far they can go." -T.S. Eliot
And my personal favorite,
"You can't steal second base and keep your foot on first." -Frederick Wilcox
That's IF I were in favor of trading Upton. I'm not. Trading the mysterious and talented Mr. Upton would be an incredible mistake for precisely the reason why I included the quotes.
I wouldn't make the trade out of fear of failure. Fear that Upton's emergence would happen for some other team. That simply cannot happen and it would be foolish for the D-backs to take that risk.
Maybe I can't steal second with my foot on first but I'm not getting thrown out either.
If you're the Diamondbacks and you get this wrong, your fan base would never forgive you for it. Josh Byrnes (did I say Josh Byrnes-I meant Jeff Moorad) was never able to live down the Eric Byrnes extension. Kevin Towers would experience that wrath times ten if he were to trade Upton just in time for Upton to blossom.
I just can't see the bounty they'd receive in return as worth the risk. Honestly I don't think it's even close.