The cost of the Dodgers’ reluctance to use their top relievers in “minus” games, as manager Dave Roberts likes to say, became clear in Game 5 of the National League Championship Series.

A slim early-game deficit ballooned to an insurmountable seven-run hole when the Dodgers left Jack Flaherty in for a five-run third inning. Even though the offense responded by scoring five times after that, the New York Mets’ lead had grown too big for the Dodgers to complete a come-from-behind win.

“You have to kind of remain steadfast in how you use your pitchers,” Roberts argued. “Because ultimately it’s about winning four games in a seven-game series.”

And as the NLCS shifts back to Los Angeles, the Dodgers are banking on that cautious bullpen management to yield pennant-clinching benefits.

Needing just one more win to reach the World Series, the Dodgers will run a bullpen game in Sunday’s Game 6, Roberts confirmed during Saturday’s off-day. The hope is that the bullpen bullets they saved in Game 5 — and a similar loss in Game 2 — will pay off back at Dodger Stadium.

Even though the Dodgers’ starting pitchers this series (including Landon Knack in Game 2, who followed an opener) have combined for just 21 ⅓ innings in the first five games, the most trusted options in the team’s bullpen have largely been spared.

Michael Kopech, Evan Phillips and Daniel Hudson have each pitched just once in this series. Anthony Banda has thrown only 20 pitches over two appearances. Blake Treinen has taken down 2 ⅓ innings in two outings, but only faced one hitter twice in that span: Mets shortstop Francisco Lindor.

Dodgers reliever Blake Treinen delivers during Game 3 of the NLCS against the Mets on Wednesday.

(Robert Gauthier / Los Angeles Times)

It means, going into Game 6, the Dodgers’ top relief arms will not only be fresh, but relatively unfamiliar to the Mets’ lineup — a potentially impactful byproduct of the Dodgers’ decision to essentially punt on their two losses this past week.

According to MLB researcher Sarah Langs, hitters in the postseason since 2019 have a .275 batting average and .483 slugging percentage when facing relief pitchers for a third time in a series. For comparison, hitters in the postseason have only hit .232 with a .392 slugging percentage overall in that same span.

This is a dynamic the Dodgers are hoping factors into the next two days, when their relievers will likely get most — if not all — of Game 6 and could be needed for more big innings behind starter Walker Buehler in Game 7, if the series gets there.

“We’ve kind of been protected from some of their guys in the lineup,” Phillips said. “And I think the rest is probably more important, to keep our guys fresh for tomorrow and a Game 7 if necessary. But those two things are hopefully in our favor.”

Exactly how the Dodgers’ Game 6 pitching plan will look remains unclear. Roberts said it could look similar to Game 2, but that he will be more willing to get aggressive with his higher-leverage arms earlier in the game.

“It’s an all-hands-on-deck situation,” Roberts said. “That’s how I’m gonna look at tomorrow.”

What is evident, however, is the Dodgers’ comfort level in depending upon the bullpen at the season’s most critical point.

It worked in Game 4 of the NL Division Series, when the Dodgers were facing elimination. The unit has been integral in each of the club’s other five wins this October, as well. Overall, Dodgers relievers have a 2.94 ERA in the playoffs. And their highest-leverage quintet — Treinen, Phillips, Kopech, Hudson and Banda — has been virtually flawless, combining for a staggering 23 ⅔ scoreless innings.

Given the club’s conservative usage of those five lately, they should be primed to continue that dominance through the rest of this series.

The Dodgers, of course, will need to them to be; effectively putting the season in their hands after deciding to not more aggressively chase comeback wins in their two losses to the Mets this series.

“I think we’ve kind of built up that confidence and that equity in bullpen games over the course of the past few seasons,” Phillips said. “Bullpen games are a piece of how we run things here. We’re certainly excited about the opportunity to have a piece in it tomorrow.”

Freddie Freeman’s status

It remains unclear if first baseman Freddie Freeman, who has just one hit in his last 15 at-bats while continuing to battle a sprained ankle, will be in the lineup for Game 6.

Following Freeman’s hitless — and clearly limited — performance in Game 5, Roberts said sitting the former MVP was “certainly an option.” As of Saturday afternoon, however, Roberts had yet to come to a final decision.

“I’m not gonna compromise his health, or certainly winning a game tomorrow, if he’s not mentally and/or physically ready to go,” Roberts said.