Where Matt Kemp’s April Fits in History
Over at ESPN yesterday, Jayson Stark posed the question of whether Matt Kemp’s amazing April performance is the best April in the history of the game. Stark decided to tackle the question by looking only at the players that had matched or beaten him in a group of categories that contained BA, OBP, and SLG, but also HR, XBH, R, and RBI. I have a great deal of respect for Stark and enjoy his work, but at the end of the column, I couldn’t help but wonder what happened if we got rid of the useless numbers and looked at ones that put things in a little more context.
So, using our custom leaderboard function and the monthly split feature, I went year-by-year from 1974 (the first year we have monthly split data) to 2012 and looked for players who had matched Kemp’s 20 batting runs in the season’s first month. Batting Runs is the offensive component of WAR, and it offers a few advantages – it’s park and league adjusted so that different slash lines from different eras can be put on an even playing field, and since it is a counting stat, it evens out months where there are differences in playing time. After all, if a player hit nearly as well as Kemp but did it in 20 more plate appearances, that’s a comparable performance, even if it falls just shy by looking at rate metrics.
Over the last 39 years, eight players have created 20 or more batting runs above average in the first month of the season.

