Vernon Wells and Alex Rios each had an amazing minor league season (1999 for Wells, 2003 for Rios) that made us all think they were the next Mike Trout... or the first Mike Trout I guess since Mike Trout did not exist then.
Each of the seasons were not that meaningful, beyond the effect they had on the entire average. Wells and Rios both had another mediocre minor league season. In the majors their careers were the same combination of good seasons and bad.
It is the averages that count, the more data the better, For any player I can a good game, week, month, and year.