Major League Baseball announced the umpiring crews for both the National League Championship Series and the American League Championship Series on Thursday.

Gerry Davis, who's in his 27th year as a Major League umpire, will be the crew chief for the ALCS, which begins on Friday at 8 p.m. ET, when the Yankees play the Rangers in Arlington. Davis, working his 21st postseason series and eighth LCS, will work with regular-season crew chief Brian Gorman, Angel Hernandez, Fieldin Culbreth, Jim Reynolds and Tony Randazzo.

Davis will be behind the plate for Game 1 of the ALCS, with Randazzo at first base, Reynolds at second base, Hernandez at third base, Culbreth in left field and Gorman in right field.

Derryl Cousins, a 32-year Major League umpire, will serve as the crew chief during the NLCS, which begins in Philadelphia on Saturday at 7:30 p.m. ET, when the Phillies meet the Giants. It is the 15th career postseason assignment for Cousins, who will be on the field for his seventh LCS.

Cousins' crew will feature regular-season crew chief Tom Hallion, Wally Bell, Ted Barrett, Jeff Nelson and Dan Iassogna. Cousins will be the home-plate umpire in Game 1 of the NLCS, with Iassogna at first, Barrett at second, Bell at third, Nelson in left field and Hallion in right field.