Liposomal Irinotecan With TAS102 and Bevacizumab for Patients With Metastatic Colorectal Cancer

Inclusion Criteria: * Patients must be ≥ 18 years of age * Eastern Cooperative Oncology Group (ECOG) performance must be 0 or 1. * Patients must have a histologically or cytologically confirmed diagnosis of colorectal adenocarcinoma and be metastatic or unresectable. * The cancer must be mismatch repair proficient. * Patients must have had prior treatment with 5-fluorouracil, oxaliplatin, irinotecan containing regimens. If RAS wild-type must have received prior anti-EGFR therapy with either cetuximab or panitumumab. If RAS wild-type and HER2 positive then must have had a prior HER2 targeted therapy. Exclusion Criteria: * Uncontrolled concurrent medical illness that would not allow for the completion of the planned therapy. * Patients whose cancers possess BRAF V600 mutations are excluded. * Patients must stop the use of strong inducers/inhibitors of CYP3A4 at least 2 weeks before initiating therapy. * Patients must not have mismatch repair deficient or microsatellite instability high cancers. * Patients must not have received prior TAS102.