This paper presents the design and implementation of a custom-built event processing engine called BlueBay developed for live monitoring of soccer games. We experimentally evaluated our system using a real workload and report on its performance. Our results indicate that BlueBay achieves a throughput of up to 790k events per second, therefore processing the game's input sensor stream about 60 times faster than real-time. In addition to our custom implementation, we also investigated the applicability of off-the-shelf general-purpose event processing engines to address the soccer monitoring problem. This effort resulted in two additional and fully functional implementations based on Esper and Storm. Copyright © 2013 ACM.