He played almost his entire career on Fisher and underachieved most of it. A 1st round pick with tons of physical ability, but I guess the words you used were accurate. He did have a good season and Fisher was the coach, but the cause and effect is highly unlikely when you consider all the other pieces of evidence.

I say this is what is referred to as a statistical anomaly

Anomaly detection
In data mining, anomaly detection (or outlier detection) is the identification of items, events or observations which do not conform to an expected pattern or other items in a dataset.