There is a mathematical phenomenon sophisticated daily fantasy sports players pay attention to known as regression to the mean. In terms of sports, the concept suggests that when an event has a substantial history of occurring with a certain frequency and then occurs with abnormally greater or less frequency for a relatively brief period of time, there is likelihood that, going forward, the frequency will realign with the historical average.
An example:
A career .250 hitter bats .400 for the first 50 games of a baseball season. Unless there is some fundamental reason for the improvement -- such as a new batting stance -- the likelihood is, through the next 112 games of the season, his hitting will cool off so that, after a full 162 game schedule, his batting average will be closer to .250 than .400.
