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BP Daily: Explaining the JUMP metric

Some explanation on JUMP: I limited the scope of the system to the post-strike time frame for three main reasons. First, none of the 28 winners were pitchers. Second, only one played for a team that finished below .500 (Alex Rodriguez in 2003). Third, 22 of them played on teams that qualified for the expanded postseason; an extremely strong tendency that could help separate seemingly equal candidates. Instead of focusing on round-numbered benchmarks like James did (a .300 batting average, 100 RBIs), I chose to dispense with actual stat totals and rates and focus on league rankings among batting title qualifiers (3.1 plate appearances per game) in 12 key offensive categories: batting average, on-base percentage, slugging percentage, OPS, hits, homers, total bases, runs, RBIs, walks, intentional walks and steals.