Stats & Sabermetrics
OPS and OPS+ Explained: The Simple Stat That Beat Batting Average
How OBP and slugging combine into OPS, why OPS slightly overrates power, and how OPS+ adjusts for park and league so that 100 means average.
sabermetrics
Stats & Sabermetrics
WAR Explained: What Wins Above Replacement Really Measures
What Wins Above Replacement measures, how replacement level works, why FanGraphs and Baseball-Reference disagree, and how to read WAR values.