Most, if not all, defensive metrics have Matsui as a below-average fielder.
Sheffield is a DH in RF. He shouldn't play more than 40 games in the field this year.
He's still right.
Lowell is overrated, but I did find one metric (BP's FRAA) that had him as a very good third baseman. Most others had him at about average. Gonzalez is not nearly as good as his reputation. A number of metrics have him clearly below average, and I can only find one that has him even a little above average. Lowell-Gonzalez is not the best defensive combination in MLB, by any stretch. For that matter, the idea that Coco Crisp is going to be a great CFer is based on nothing as well: his career in CF has been decidedly mediocre. He was an above-average left fielder, but he is not a centerfielder.
Aren't "better" and "superior" the same thing?