Right, and that's my point. Typically, the more minutes a player has on the field, the more likely his numbers will truly reflect his performances. For example, a player who usually scores 10 goals per season can have a lucky game and grab a hat trick. Now we might be tempted to say that he will score a large number of goals by the end of the season but in the long run, he'll score less often and eventually, his final number of goals scored will be close to 10.
If IQ plays 300 more minutes, it doesn't mean he'll score more goals but could mean quite the opposite. That he'll score less frequently.