Wiktionary
n. (context baseball English) the outfield defensive player who stands in the middle of the field
WordNet
n. the person who plays center field [syn: centerfielder]
Wikipedia
A center fielder, abbreviated CF, is the outfielder in baseball who plays defense in center field – the baseball fielding position between left field and right field. In the numbering system used to record defensive plays, the center fielder is assigned the number 8.
Usage examples of "center fielder".
Reiser, the center fielder nonpareil of the '40s and '50s, the man who had made the most hits, scored the most runs, and compiled the highest batting average in history, took a ragamuffin team that had finished last in 1968 and led them to first place with a miraculous combination of managerial insight and inspiration.
Because it wasn't, you see, that one was the best center fielder imaginable, only that one knew exactly, and down to the smallest particular, how a center fielder should conduct himself.
Oh, to be a center fielder, a center fielder-and nothing more!
It is a hard, rising line drive, over the fence and gone before the center fielder has a chance to turn and look, let alone cruise back and grab it.
This time the ball goes way up in the air, and it takes six seconds before the center fielder catches it.
Suppose I ask you to hit a high pop fly to the center fielder, but to make it reach the fielder in half a second instead of six seconds.
As the center fielder pursued the rolling ball, he took off for second base.
He mentioned the name of my regular center fielder, who was home sick, and suggested that Mary Hudson take his place.
The Chief asked me what the hell did I mean I didn't need a center fielder.
The center fielder quickly retrieved the ball and threw it in to the shortstop, who had circled back to cover the base, but too late a cloud of dust marked where Robinson had already slid in safely.