7. Relapsed/Refractory MCL: Absolute neutrophil count (ANC) >/= 500/mm^3, platelet count >/= 30,000/mm^3 (transfusion to reach platelet count allowed). (Patients who have bone marrow infiltration by MCL are eligible if their ANC is >/= 500/mm^3 [growth factor allowed] or their platelet level is equal to or > than 15,000/mm^3. These patients should be discussed with either the PI or Co-PI of the study for final approval).