RecruitingPhase 2Drug trialA Phase II Study of Glofitamab Plus Polatuzumab-R-CHP for Patients With High-risk Diffuse Large B-cell LymphomaThe goal of this research study is to evaluate the combination of study drugs, Glofitamab and Polatuzumab, and a standard chemotherapy regimen, R-CHP, as a treatment for high-risk diffuse large B-cell lymphoma. The names of the treatment interventions involved in this study are: * Glofitamab (T-cell bispecific antibody) * Polatuzumab (antibody-drug conjugate) * R-CHP (a chemotherapy regimen comprised of Rituximab, Cyclophosphamide, Doxorubicin Hydrochloride, and Prednisone)