Los Angeles Dodgers pitcher Clayton Kershaw threw the last regular season inning of his Major League career on Sunday, closing the book on one of the best careers for a starter the game has seen in the live ball era.

For proof, look no further than the career ERA+ list, which Kershaw finishes atop, alongside Hall of Famer Pedro Martinez.

As pointed out by Dodgers writer Blake Harris, Kershaw and Martinez both retired with a career ERA+ of 154, better than any pitcher since 1920. Lefty Grove is behind them, ranking third on the list at 148, with Rodger Clemens fourth at 143.

For the uninitiated, ERA+ is a standardized measure of ERA that takes into account ballpark factors and the level of offensive production in the league. Like OPS+, 100 is considered average, with points higher an

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