wOBA is a rate stat that weights each offensive event (walk, single, HR, etc.) and improves on OBP.
xwOBA uses exit velocity, launch angle, and sprint speed to produce an expected, luck-neutral version of the same metric.
If xwOBA > wOBA, a hitter has been unlucky; xwOBA < wOBA means lucky. Over larger samples the two tend to converge.
Murakami's early-2026 xwOBA of .433 is elite — if this pace holds, his OPS has room to climb further.