Purpose

The primary objectives of this study are: Phase 1: To evaluate the safety of sequenced therapy with lenzilumab and axicabtagene ciloleucel in participants with relapsed or refractory large B-cell lymphoma and identify the most appropriate dose of lenzilumab for Phase 2. Phase 2: To evaluate the incidence of neurologic events with sequenced therapy given at the recommended Phase 2 dose (RP2D) of lenzilumab in participants with relapsed or refractory large B-cell lymphoma.