Look, don't get me wrong. Cargo would be magnificent out there. In fact, anywhere he plays in the outfield, he's magnificent. I'd go so far as to say, if he's in left, he's the best leftfielder in the game. If he's in center, he's the best centerfielder in the game. And if he's in right, well, you get it. He's just fantastic defensively. Covers a lot of ground, can make the spectacular leaping or diving catch, and has a great arm.
But putting him in CF would have Worn.Him.Out. And if there's one guy you don't wanna wear out, it's Carlos Gonzalez. He's too important to this lineup, to this team.
That Coors outfield is a killer---especially for center fielders. There's a lot of space out there. I mean, you need a shuttle service to get from left to right. And with the 35-year old and not-so-swift Michael Cuddyer in right field, Cargo would've had to cover even more ground. On top of that, we've seen Cargo play centerfield. He plays it with abandon, which can lead to injury. And we know how bad the Rockies can be without Cargo (and Tulo) in this lineup.
So, good decision, Rockies! Keep Cargo in left and chances are better that you'll keep him healthy. (You're probably keeping him happy, too. Reading all the Cargo quotes, it sounds like he wanted to stay in left.)
Now, the question is, who plays centerfield? If I'm manager Walt Weiss, I'm hoping off-season acquisition Drew Stubbs is the answer. He's pretty good with the glove. The hope is, he finds a way to hit righties better and improves his on-base percentage. The Rockies will take a look at Charlie Blackmon and Corey Dickerson in CF, but if either of them is in your starting lineup every day, sorry, it weakens the lineup.
You know, the team DID have the answer in center. It was Dexter Fowler. But the Rockies didn't wanna pay him and, this offseason, shipped him off to Houston. Remind me again, what did they get for him? Oh, right. (FYI, execs all over baseball are still scratching their heads over that move. Most teams wouldn't trade away a moderately priced, speedy young center fielder who can hit leadoff. Then again, the Rockies aren't like most teams.)
But this move---keeping Cargo in left? A nice one. And the right one.