He's played a grand total of 85 innings in his pro career in the outfield, he'd need reps and likely a ST to get acclimated to that kind of change, in a pinch sure, but I doubt we ever see Ernie in the OF, all his value's in his infield defense anyhow, it'd be counterproductive. Same goes for DH, the player he's replacing in the infield can DH.