NLDS: Cubs vs. Giants

Game 4 in San Francisco: Cubs right fielder Jason Heyward, middle, celebrates with teammates after scoring in the ninth inning as Giants catcher Buster Posey (foreground) reacts.

Game 4 in San Francisco: Cubs second baseman Ben Zobrist hits an RBI single during the ninth inning.

Game 4 in San Francisco: Giants center fielder Denard Span reacts to a called strike three during the sixth inning.

Game 4 in San Francisco: Cubs center fielder Dexter Fowler is tagged out by Giants shortstop Brandon Crawford during the sixth inning.

Game 4 in San Francisco: Cubs third baseman Javier Baez heads to third base after a throwing error during the fifth inning.

Game 4 in San Francisco: Cubs shortstop Addison Russell attempts a double play during the fourth inning.

Game 4 in San Francisco: Giants right fielder Gregor Blanco watches Cubs catcher David Ross'home run go over the fence during the third inning.

Game 4 in San Francisco: Cubs catcher David Ross celebrates after hitting a solo home run during the third inning.

Game 4 in San Francisco: Giants center fielder Denard Span slides into third base during the first inning.

Game 4 in San Francisco: Cubs center fielder Dexter Fowler talks to umpire Marvin Hudson after a call during the first inning.

Game 4 in San Francisco: Giants starting pitcher Matt Moore delivers a pitch during the first inning of Game 4.

Game 4 in San Francisco: A general view of AT&T Park before the game.

Game 3 in San Francisco: Giants second baseman Joe Panik celebrates hjis walk-off double in the 13th inning.

Game 3 in San Francisco: The Giants celebrate after second baseman Joe Panik hit a walk-off RBI double in the 13th inning.

Game 3 in San Francisco: Giants second baseman Joe Panik hits a walk-off RBI double in the 13th inning.

Game 3 in San Francisco: Giants second baseman Joe Panik slides safely back to second against Cubs second baseman Javier Baez in the 11th inning.

Game 3 in San Francisco: Cubs third baseman Kris Bryant celebrates with third base coach Gary Jones after his two-run home run in the ninth inning.

Game 3 in San Francisco: A home run by Cubs third baseman Kris Bryant sails past the reach of Giants outfielder Gregor Blanco in the ninth inning.

Game 3 in San Francisco: Giants shortstop Brandon Crawford runs to third base against Cubs second baseman Javier Baez.

Game 3 in San Francisco: Cubs center fielder Albert Almora Jr. can't make a catch in the eighth inning.

Game 3 in San Francisco: Giants first baseman Brandon Belt celebrates as catcher Buster Posey runs home to score in the eighth inning.

Game 3 in San Francisco: Giants relief pitcher Derek Law reacts after getting the final out in the fifth inning.

Game 3 in San Francisco: Umpires review a play in the sixth inning.

Game 3 in San Francisco: Cubs shortstop Addison Russell throws to first for an out in the fifth inning.

Game 3 in San Francisco: Giants catcher Buster Posey hits an RBI single in the third inning.

Game 3 in San Francisco: Giants center fielder Denard Span reacts after hitting a double in the third inning.

Game 3 in San Francisco: Cubs starting pitcher Jake Arrieta hits a three-run home run during the second inning.

Game 3 in San Francisco: Giants manager Bruce Bochy greets Cubs manager Joe Maddon before the game.

Game 2 at Chicago: Cubs relief pitcher Aroldis Chapman and catcher Willson Contreras celebrate their win.

Game 2 at Chicago: Cubs relief pitcher Hector Rondon reacts after the final out of the eighth inning.

Game 2 at Chicago: Cubs second baseman Javier Baez is tagged out at second base by Giants second baseman Joe Panik during the sixth inning.

Game 2 at Chicago: Giants left fielder Angel Pagan beats the throw to Cubs first baseman Anthony Rizzo (44) during the fourth inning.

Game 2 at Chicago: Cubs relief pitcher Travis Wood celebrates after hitting a home run during the fourth inning.

Game 2 at Chicago: Cubs catcher Willson Contreras watches a bunt by Giants left fielder Angel Pagan roll into foul territory during the fourth inning.

Game 2 at Chicago: Cubs starting pitcher Kyle Hendricks walks off the field with athletic trainer P.J. Mainville after being hit with a ball during the fourth inning.

Game 2 at Chicago: Giants first baseman Brandon Belt hits a sacrifice fly to score Gregor Blanco during the third inning.

Game 2 at Chicago: Cubs second baseman Javier Baez celebrates after scoring on a two-run RBI single hit by Kyle Hendricks during the second inning.

Game 2 at Chicago: Cubs shortstop Addison Russell throws to first base to complete a double play to end the second inning.

Game 2 at Chicago: Cubs left fielder Ben Zobrist hits an RBI single in the first inning.

Game 2 at Chicago: Cubs starting pitcher Kyle Hendricks throws during the first inning.

Game 1 in Chicago: Cubs second baseman Javier Baez hits a a home run in the eighth inning.

Game 1 in Chicago: Giants center fielder Gorkys Hernandez makes a catch on a fly ball hit by Cubs catcher David Ross during the third inning.

Game 1 in Chicago: Cubs third baseman Kris Bryant hits a double during the fourth inning.

Game 1 in Chicago: Giants right fielder Hunter Pence hits a single.

Game 1 in Chicago: Cubs catcher David Ross throws to first base for an out during the second inning.

Game 1 in Chicago: Giants center fielder Gorkys Hernandez bunts for a single during the first inning.

Game 1 in Chicago: Cubs shortstop Addison Russell tags out Giants center fielder Gorkys Hernandez on an attempted steal during the first inning.

Game 1 in Chicago: Cubs starting pitcher Jon Lester pitches during the first inning.

Game 1 in Chicago: Cubs shortstop Addison Russell greets left fielder Ben Zobrist as the lineup is announced.

Game 1 in Chicago: Giants starting pitcher Johnny Cueto warms up.

Game 1 in Chicago: Cubs manager Joe Maddon talks with Giants starting pitcher Matt Moore.