08:18 AM ET 11.09 | Theo Epstein, already with a blockbuster shortstop trade to his credit in Boston, may have the opportunity again in Chicago. Make that splash your fans have been waiting for since you were hired. Trade Starlin Castro for Justin Upton. Javier Baez has your back. At 22, Castro is far from a polished product. But he's also probably the best young shortstop in baseball. Name someone better. I tried, and can't. That's good news for the Cubs. Even better is that Baez, 20 next month, it about to push Castro hard. ... While Castro recently signed a seven-year, $60 million contract, he is not exempt from trade rumors. There are only a few whispers now, but you soon may hear how the Cubs are as good of a fit with the Diamondbacks for Upton as the Rangers.