Major League Baseball is expanding its probe of the 2017 Houston Astros' sign-stealing system, sources told Jeff Passan of ESPN. The league is now investigating whether other teams, including the 2019 Astros, stole signs illegally using technology.

Current Boston Red Sox manager Alex Cora, who was a bench coach with the 2017 Astros, and New York Mets skipper Carlos Beltran, who played for Houston that season, have been identified as playing key roles in devising an electronic sign-stealing system, Ken Rosenthal and Evan Drellich of The Athletic reported. The league plans to interview both Cora and Beltran, along with Houston manager AJ Hinch.

The league's investigation is expected to include people from the Red Sox organization and the 2019 Astros, according to Passan.