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Lumbar bone stress injuries (LBSI) have the highest prevalence of any injury in cricket. The purpose of this study was to determine differences in lumbar spine kinematics between fast bowlers who avoid LBSI and those who sustain LBSI. 45 elite male fast bowlers completed 6 maximum effort deliveries captured by a motion analysis system. Upper and lower lumbar spine joint angles were reported at key instances and compared between groups. MRI and medical records revealed current and future incidence of LBSI. 47% of fast bowlers were diagnosed with LBSI. While no statistically significant differences in lumbar spine joint angles between groups were observed, LBSI cases demonstrated non-statistically significantly greater upper lumbar spine extension at BFC, FFC and maximal value which warrants further investigation.