OK. I guess I was arguing about something different, which had more to do with HanRam's being a terrible contract.
There are, of course, a lot of random variances in player performances and outright luck that can make a GM look good or bad.
With Ben a classic example would be Victorino. Terrific in 2013, a major contributor to a ring, and then useless, finito, in 2014 and 2015.
A lot of guys had 'good outlier' seasons in 2013 for us, in fact.