On June 14, 2005, the Nationals began a three-game series against the Angels, who were still helmed by Mike Scioscia. This marked Guillén's first return to Anaheim since being traded. Going into the series, both Guillén and Scioscia kept a civil tone publicly, each indicating that the past was behind them and claiming that they held no hard feelings toward each other. However, the tensions below the surface were exposed when, during the second game of the series, Angels pitcher Brendan Donnelly was found with illegal substances on his glove.