I know Y! O-Rank/Rank is not exactly perfect but:
I have 4 players whose rank is 100 less than their Orank.
I have 5 players whose rank is 200-700 less than their Orank.
I have 2 players whose rank is 1000+ less than their Orank.
The only players I have who are out performing their Orank are:
T. Helton Orank 678 rank 120
R. Weeks Orank 189 rank 64
M. Gonzalez Orank 175 rank 118
J. Upton Orank 129 rank 98
I'm last in R, 2B, ERA, pitchers BB, W, K/BB, QS and WHIP
I ain't askin' nobody for nothin, If I can't get it on my own. - Charlie Daniels