Three umpires will be working their first World Series this week.

Chris Conroy will be behind the plate for Tuesday night's opener between the Atlanta Braves and Houston Astros. First-timers Dan Bellino and Mike Muchlinski will also be on the field.

Crew chief Tom Hallion will be at first for the opener, Bellino at second, Ted Barrett at third, Muchlinski in left and Alfonso Marquez in right. Ron Kulpa will be the reserve umpire as part of the seven-man crew.

Barrett will be working his fifth Series, Marquez his fourth and Hallion and Kulpa their second.