The most controversial part of DIPS is the idea that pitchers have little influence over what happens to balls that are put into play. Some people believe this has since been well established (see below), primarily by showing the large variability of most pitchers' BABIP from year to year. However, while this shows that BABIP individual may be volatile from year to year, there is a wide variation in career averages among pitchers and this seems to correlate with career success. For instance, there is not a single pitcher in the Hall of Fame with a below average career BABIP.