Verducci effect

Named for Tom Verducci of Sports Illustrated, this is a negative forward indicator for pitcher workload. Verducci, who called this the 'Year After Effect,' found that pitchers under the age of 25 who have 30-inning increases year over year tend to underperform. Will Carroll independently found that pitchers who break the "Rule of 30" tend to get injured. Carroll renamed this 'rule' the Verducci Effect in honor of the man who initially found the evidence.