Red Sox starter Jake Peavy, acquired in a July trade, will start Game 4 of the ALCS on Wednesday. (Mike Ehrmann/Getty Images)

One of the most significant trade-deadline deals of the past summer will impact Game 4 of the American League Championship Series, in one way or another, Wednesday night when Jake Peavy takes the mound for the Boston Red Sox.

On July 30, Peavy was dealt by the Chicago White Sox to Boston in a three-team deal in which the Red Sox sent minor leaguers to Chicago and shortstop Jose Iglesias to Detroit. With Jhonny Peralta suspended for 50 games following the Biogenesis doping investigation, the Tigers needed a shortstop, and Iglesias fit in perfectly. The Red Sox, with Clay Buchholz out for three months with shoulder problems, needed a veteran starting pitcher.

“It’s a great baseball trade because it clearly had specific needs and fit for the three teams involved,” Boston Manager John Farrell said. “Secondly, you have to give up a quality player to get a quality player in return.”

Peavy, 32, went 4-1 with a 4.04 ERA in 10 starts for the Red Sox, and he gave up one run in 52 / 3 innings of the clinching division series victory over Tampa Bay. That was his first postseason start since 2006 with San Diego.

“This is what . . . you dream of being able to do: pitch in games that mean the world to your teammates, to yourself, to your coaching staff and your fan base,” Peavy said. “I promise you this: every part of me will be ready to go tomorrow.”

Iglesias, 23, appeared in 63 games for the Red Sox, hitting a remarkable .330. He hit a more realistic .259 in his 46 games for the Tigers and started five of the first six postseason games for Manager Jim Leyland.

Gomes plays, Nava sits

Farrell went with Jonny Gomes in left field over Daniel Nava in Game 3 essentially on a gut instinct. “One of the things we discussed yesterday . . . was when we’ve done some things offensively, Jonny has been in the middle of it,” Farrell said. “I think he brings a little different personality to our team.”

In keeping Gomes in the lineup, Farrell chose to ignore his 0-for-9 history against Tigers starter Justin Verlander. (Nava was 1 for 3 with a double off Verlander.) Farrell indicated that Nava would be back in the lineup against Detroit’s Doug Fister for Wednesday night’s Game 4.

Dodgers stick with Nolasco

The Los Angeles Dodgers considered bringing back ace right-hander Zack Greinke on short rest for Tuesday night’s Game 4 of the NLCS, but decided against it, preferring to save Greinke and lefty ace Clayton Kershaw, fully rested, for Games 5 and 6.

“We flip-flopped more than once on what we wanted to do with it,” Manager Don Mattingly said of Tuesday’s decision. “And at the end of the day . . . I didn’t feel good about [pushing Greinke up to start on three days’ rest]. We just didn’t feel like at this point it was the right thing.”

Thus, the Dodgers’ starter for Game 4 was veteran right-hander Ricky Nolasco, who hadn’t started a game since Sept. 25 and who posted a 6.66 ERA in six September appearances. In the division series against Atlanta, the Dodgers skipped him in Game 4, opting to bring Kershaw back on three days’ rest for what became the clinching game of the series.

Sheinin reported from Los Angeles.