 Complete the following phrase:  For years, some individuals on other teams had suspected the Astros of stealing signs, but there was no public reporting on the subject until November 2019, when reporters Ken Rosenthal and Evan Drellich at The Athletic published an article detailing the teams activities. Mike Fiers, a pitcher who played for the Astros in 2017, told The Athletic that the organization used a video camera in the center field seats to film the opposing catchers signals to the pitcher regarding the next pitch. Astros players or team staffers watching the live camera feed behind the dugout used various audio cues, such as banging on a trash can, to signal to the batter what type of pitch was coming next. MLB investigated the allegations and confirmed in January 2020 that the Astros illegally used a camera system to steal signs during the 2017 regular season and postseason, during which they won the World Series, as well as in part of the 2018 season. MLB found no evidence of illicit sign stealing in the 2019 season, in which the Astros advanced to the 