Inclusion Criteria:

1. Patients with potentially resectable malignant pleural mesothelioma, IMIG stage I-III
2. Subject, age >/= 18 years
3. Performance Status (ECOG) PS 0-1
4. No prior chemotherapy for mesothelioma within the last 3 years
5. No prior radiation to the area of primary disease. Radiation to chest wall port sites is acceptable.
6. No prior targeted biologic therapy (i.e. EGFR inhibitors, VEGF inhibitors) within the last 3 years
7. Adequate Organ Function: a) Total bilirubin < 2.0 times the institutional Upper Limit of Normal (ULN), b) Hepatic enzymes (AST, ALT ) </= 2.5 times the institutional ULN, c) Serum Na, K+, Mg2+, Phosphate and Ca2+>/= Lower Limit of Normal (LLN), d) Serum Creatinine < 1.5 time the institutional ULN, e) Hemoglobin, Neutrophil count, Platelets, PT, PTT all Grade 0-1
8. Ability to take oral medication (dasatinib must be swallowed whole)
9. Women of childbearing potential (WOCBP) must have: A negative serum or urine pregnancy test (sensitivity </= 25IU HCG/L) within 72 hours prior to the start of study drug administration
10. Persons of reproductive potential must agree to use an adequate method of contraception throughout treatment and for at least 4 weeks after study drug is stopped
11. Signed written informed consent including HIPAA according to institutional guidelines

Exclusion Criteria:

1. Malignancy [other than the one treated in this study] which required radiotherapy or systemic treatment within the past 3 years.
2. Prior therapies to be excluded: any prior chemotherapy or targeted biologic therapy for mesothelioma used within the last 3 years
3. Concurrent medical condition which may increase the risk of toxicity, including: a) Clinically-significant coagulation or platelet function disorder (e.g. known von Willebrand's disease) b) Any disease which requires persistent anticoagulation therapy (and the patient may not be taken off the anti-coagulation safely) with coumadin, factor Xa inhibitors, or heparin (low-molecular weight, standard)
4. Cardiac Symptoms, consider the following: a) Uncontrolled angina, congestive heart failure or MI within (6 months), b) Diagnosed congenital long QT syndrome: 1. Any history of clinically significant ventricular arrhythmias (such as ventricular tachycardia, ventricular fibrillation, or Torsades de pointes), 2. Prolonged QTc interval on pre-entry electrocardiogram (> 450 msec), 3. Subjects with hypokalemia or hypomagnesemia if it cannot be corrected
5. History of significant bleeding disorder unrelated to cancer, including: a) Diagnosed congenital bleeding disorders (e.g., von Willebrand's disease), b) Diagnosed acquired bleeding disorder within one year (e.g., acquired anti-factor VIII antibodies), c) Ongoing or recent (</= 3 months) significant gastrointestinal bleeding
6. Concomitant Medications, consider the following prohibitions: a) Drugs that are generally accepted to have a risk of causing Torsades de Pointes including: (Patients must discontinue drug 7 days prior to starting dasatinib): A) quinidine, procainamide, disopyramide, B) amiodarone, sotalol, ibutilide, dofetilide, C) erythromycin, clarithromycin, D) chlorpromazine, haloperidol, mesoridazine, thioridazine, pimozide E) cisapride, bepridil, droperidol, methadone, arsenic, chloroquine, domperidone, halofantrine, levomethadyl, pentamidine, sparfloxacin, lidoflazine. F) moxifloxacin, levofloxacin
7. The concomitant use of H2 blockers or proton pump inhibitors with dasatinib is not recommended.The use of antacids should be considered in place of H2 blockers or proton pump inhibitors in patients receiving dasatinib therapy.a)Patient agrees to discontinue St. Johns Wort while receiving dasatinib therapy,b)Patient agrees that IV bisphosphonates will be withheld for the first 8 weeks of dasatinib therapy due to risk of hypocalcemia,c)Patient may not be receiving any prohibited CYP3A4 inhibitors,d)Patient may not be receiving any alternative herbal remedies during the dasatinib treatment period
8. Women: a) are unwilling or unable to use an acceptable method to avoid pregnancy for the entire study period and for at least 4 weeks after cessation of study drug, or, b) have a positive pregnancy test at baseline, or c) are pregnant or breastfeeding, d) Sexually active women of childbearing potential (WOCBP) must use an effective method of birth control during the course of the study, in a manner such that risk of failure is minimized.,
9. -continued from exclusion #8-: e) Prior to study enrollment, women of childbearing potential must be advised of the importance of avoiding pregnancy during trial participation and the potential risk factors for an unintentional pregnancy., f) All WOCBP MUST have a negative pregnancy test prior to first receiving dasatinib. If the pregnancy test is positive, the patient must not receive dasatinib and must not be enrolled in the study.
10. Prisoners or subjects who are compulsorily detained (involuntarily incarcerated) for treatment of either a psychiatric or physical (e.g., infectious) illness