Major League Baseball today announced the Major League Umpires who have been assigned to 2018 Postseason games through the Division Series. The Wild Card Game crew chiefs will be Bill Miller and Gerry Davis, while the Division Series crew chiefs will be Ted Barrett, Gary Cederstrom, Jerry Layne and Mike Winters. 
Miller will be the second base umpire for tonight's National League Wild Card Game on ESPN, with Chris Guccione behind home plate. They will be joined by Tripp Gibson, James Hoye, Gabe Morales and regular season crew chief Mark Wegner. In Wednesday's American League Wild Card Game on TBS, Davis, the all-time leader with 143 Postseason games umpired, will be the second base umpire, with Jim Wolf calling balls and strikes. Greg Gibson, Pat Hoberg, Will Little and Alan Porter round out the crew. The Replay Officials for the Wild Card Games will be Umpires Ed Hickox and Sam Holbrook.  
The NL Division Series are scheduled to begin on Thursday, October 4th. The crew chiefs on the NL side will be Ted Barrett (NL Wild Card @ MIL) and Gary Cederstrom (ATL @ LAD). Barrett's crew has Kerwin Danley, Alfonso Marquez, Mike Muchlinski, Todd Tichenor and John Tumpane. The crew led by Cederstrom includes Lance Barksdale, Doug Eddings, regular season crew chief Tom Hallion, Adrian Johnson and Jim Reynolds. All NLDS games will be telecast exclusively by FS1 or MLB Network. 
The crew chiefs for the AL Division Series, which are set to start on Friday, October 5th, are Jerry Layne (CLE @ HOU) and Mike Winters (AL Wild Card @ BOS). The crew guided by Layne includes Chris Conroy, Chad Fairchild, Andy Fletcher, regular season crew chief Jeff Nelson and Tim Timmons. The crew of Winters has Cory Blaser, Dan Bellino, regular season crew chief Fieldin Culbreth, Angel Hernandez and D.J. Reyburn. TBS will exclusively telecast all ALDS games.
The Replay Officials during the Division Series will be Umpires Marvin Hudson, Brian Knight, David Rackley and Bill Welke. A complete listing of the rotations through the Division Series accompanies this press release. 
The 2018 Postseason schedule can be viewed at MLB.com/postseason. All games telecast on MLB Network, TBS and FOX will be available to MLB.TV subscribers who are authenticated subscribers to the applicable network through a participating pay TV provider. The NL Wild Card Game will also be available via the ESPN App. ESPN Radio will provide live national coverage of all 2018 MLB Postseason games, including the Wild Card Games.  
TONIGHT'S NL WILD CARD GAME, COLORADO ROCKIES VS. HOST CHICAGO CUBS ON ESPN:
NL | WC | Umpire | Previous Postseason Assignments
HP | CHRIS GUCCIONE | 2 WC; 6 DS; 2 LCS; 1 WS
1B | MARK WEGNER | 1 WC; 8 DS; 4 LCS; 2 WS
2B | BILL MILLER (CC) | 3 WC; 8 DS; 5 LCS; 3 WS
3B | JAMES HOYE | 1 WC; 2 DS
LF | TRIPP GIBSON | 1 WC
RF | GABE MORALES | [1st Career PS Assignment]
WEDNESDAY'S AL WILD CARD GAME, OAKLAND ATHLETICS VS. HOST NEW YORK YANKEES ON TBS:
AL | WC | Umpire | Previous Postseason Assignments
HP | JIM WOLF | 1 WC; 4 DS; 3 LCS; 1 WS
1B | GREG GIBSON | 2 WC; 9 DS; 4 LCS; 1 WS
2B | GERRY DAVIS (CC) | 2 WC; 13 DS; 10 LCS; 6 WS
3B | ALAN PORTER | 4 DS
LF | WILL LITTLE | 1 WC; 1 DS
RF | PAT HOBERG | [1st Career PS Assignment]
NLDS, ATLANTA BRAVES VS. HOST LOS ANGELES DODGERS ON FS1 OR MLBN:
Game 1 | Umpire | Previous Postseason Assignments
HP | ADRIAN JOHNSON | 1 DS
1B | LANCE BARKSDALE | 2 WC; 3 DS; 1 LCS
2B | GARY CEDERSTROM (CC) | 3 WC; 7 DS; 8 LCS; 3 WS
3B | TOM HALLION | 7 DS; 5 LCS; 1 WS
LF | JIM REYNOLDS | 2 WC; 6 DS; 4 LCS; 1 WS
RF | DOUG EDDINGS | 1 WC; 2 DS; 1 LCS
NLDS, NL WILD CARD GAME WINNER VS. HOST MILWAUKEE BREWERS ON FS1 OR MLBN:
Game 1 | Umpire | Previous Postseason Assignments
HP | MIKE MUCHLINSKI | 1 DS
1B | KERWIN DANLEY | 6 DS; 1 LCS; 1 WS
2B | TED BARRETT (CC) | 4 WC; 9 DS; 8 LCS; 3 WS
3B | TODD TICHENOR | 1 WC; 2 DS; 1 LCS
LF | ALFONSO MARQUEZ | 1 WC; 7 DS; 5 LCS; 3 WS
RF | JOHN TUMPANE | 1 WC
ALDS, CLEVELAND INDIANS VS. HOST HOUSTON ASTROS ON TBS:
Game 1 | Umpire | Previous Postseason Assignments
HP | CHRIS CONROY | 1 WC
1B | CHAD FAIRCHILD | 4 DS; 1 LCS
2B | JERRY LAYNE (CC) | 1 WC; 10 DS; 5 LCS; 2 WS
3B | TIM TIMMONS | 1 WC; 3 DS; 2 LCS
LF | JEFF NELSON | 3 WC; 7 DS; 7 LCS; 3 WS
RF | ANDY FLETCHER | 1 WC
ALDS, AL WILD CARD GAME WINNER VS. HOST BOSTON RED SOX ON TBS:
Game 1 | Umpire | Previous Postseason Assignments
HP | CORY BLASER | 1 WC; 2 DS
1B | DAN BELLINO | 4 DS
2B | MIKE WINTERS (CC) | 3 WC; 10 DS; 6 LCS; 4 WS
3B | ANGEL HERNANDEZ | 9 DS; 8 LCS; 2 WS
LF | FIELDIN CULBRETH | 7 DS; 6 LCS; 2 WS
RF | D.J. REYBURN | [1st Career PS Assignment]