NEW YORK (AP) — Crew chiefs Jeff Kellogg and Larry Vanover head the eight umpires working in Major League Baseball’s replay room for the first eight days of video review.

The league plans to have a pair of four-man crews man the replay room each week at Major League Baseball Advanced Media’s Manhattan office. Brian O’Nora, Dan Bellino and D.J. Reyburn are part of Kellogg’s crew that started its shift Monday night, and Angel Hernandez, Paul Nauert and Adrian Johnson are part of Vanover’s crew.

MLB plans to announce which eight umpires are in the room each week but will not identify which umpire reviews a specific replay.