Originally Posted by Patrick Bateman
Choo almost assuredly is not as bad a fielder as last year indicated, as he's not that old, and other seasons he has been more than adequate. He'd clearly be below average in CF, but his bat would of course more than make up the difference.
His UZR/150 based upon 5000+ defensive innings in RF is -3. That suggests he might be expected to be something like a -10 to -12 defender in CF.
He's probably going to be projected to be a .360-.370 wOBA type bat.
So assuming he played 600 PAs in CF, he'd be roughly +26 runs above average offensively versus a generic league average bat, he'd get +2.5 for doing it in center, and he'd get an additional +20 for the difference between replacement and "average".
So the Reds would be looking at getting a 3.5-4.0 WAR player if they traded for Choo and stuck him in center and he played without significant injury.