Arizona Diamondbacks outfielder Justin Upton is the most talented man on the trading block this offseason. Each of his suitors would send several of their own finest players to complete a deal.
"There's a very high likelihood" that the D-Backs will retain the 25-year-old, according to team owner Ken Kendrick (via Jon Heyman, CBS Sports).
GM Kevin Towers has been overwhelmed with proposals since the 2012 non-waiver trade deadline, but hasn't pulled the trigger yet.
What could force his hand?
Nick Piecoro of The Arizona Republic writes that Towers seeks high-quality help on the left side of the infield—at shortstop or third base—and in the starting rotation.
Knowing that, he would have to seriously consider the following packages.