Abstract: WW and WZ production in p{bar p} collisions at 1.96 TeV are studied in samples of {approx}3 fb{sup -1} of data using leptons, jets and missing E{sub T}. Fully leptonic decays as well as semi-leptonic decays are measured. Diboson production is expected in the standard model, and predicted cross sections are confirmed. It is important to investigate various signatures as associated production of Higgs bosons is topologically similar.