Don’t doubt the baseball gods. They described defense with high tech data and calculations seemingly beyond mortal understanding. Not just once. They did it a half-dozen times, each statistic different than the others. Each time a new acronym was born – DRS, FRAA, OAA, Rtot/TZTFR, UZR, and SDI (which combines TZ, DRS, RED, UZR, and DRA). Which statistic is best depends on the answer you seek.
Before we proceed, ‘easy’ is an option. Each team has an average runs allowed per game. No adjustments are required to compare teams. Nevertheless, you could consider the strength of each team’s pitching, and the offensive strength of the opponents faced.