The Chicago Cubs upgraded their infield in a pair of moves Tuesday, dumping Starlin Castro's once-promising contract on the Yankees while signing longtime super-sub Ben Zobrist to a four-year deal to play second base. It's a stunning fall from grace for Castro, and a huge commitment to a 35-year-old hitter who's already showing signs of decline. It makes the Cubs better, but I'm not sure it's "better" enough to justify the money spent.
There's method behind the Cubs' Tuesday madness
