I will present the results of study of the WaveBurst efficiency for simulated burst waveforms injected into the LIGO S2 playground data. It includes both the hardware and software injections. Different types of burst signals were injected into the data including the sine-Gaussian waveforms and simulated black hole merger waveforms. The WaveBurst black hole merger triple coincidence efficiency was estimated for uniform source distribution. The Livingston and Hanford beam pattern functions and time delay were taken into account.