Inclusion Criteria:  Age > 18 years old Resectable/BRPC/LAPC as defined by NCCN guidelines (Figure 1) as follows confirmed via CT, EUS, or other imaging modalities. ECOG performance status 0-2 Subject or authorized representative, has been informed of the nature of the study and has provided written informed consent, approved by the appropriate Institutional Review Board (IRB) of the respective clinical site. Candidate for SBRT at JHU Upfront treatment with multi-agent chemotherapy Candidate for surgical exploration at JHU  Exclusion Criteria:  Previous thoracic/abdominal radiation therapy Unable to receive SBRT at JHU Duodenal invasion detected on imaging which would exclude candidacy for SBRT Tumor located in pancreatic body or tail Unable to undergo Whipple procedure Evidence of disease not localized to the pancreas Any arterial reconstruction during surgery Currently enrolled in another investigational drug or device trial that clinically interferes with this study Unable to comply with study requirements or follow-up schedule Women of child bearing potential or sexually active fertile men with partners who are women of child bearing potenital who are unwilling or unable to use an acceptable method to avoid pregnancy for the entire study