Mendoza Line – Wikipedia, the free encyclopedia
The term is supposedly named for former shortstop Mario Mendoza, who had a career batting average of .215 and actually hit .198 in the 1979 season. George Brett allegedly coined the phrase when asked about his batting average. When shown his average in a newspaper, Brett was said to have made a remark along of the lines of, “I knew I was off to a bad start when I saw my average listed below the Mendoza line.” However, Brett was only behind Mario Mendoza in batting average for one day in the 1979 season, and Bruce Bochte and Tom Paciorek have also been credited as creators of the expression.
That is one of my FAVORITE baseball terms/expressions.