It was a Drew Pomeranz fastball, crushed 424 feet to left, over the Monster seats; a go-ahead, two-run home run in the sixth inning of Detroit’s 4-2 win Monday night.

For Jose Iglesias, it was simply revenge.

“I got some good memories, but I think after being traded, hitting a home run against them, especially that one, I think that’s [the best memory] against them,’’ the former Red Sox shortstop said before Tuesday’s 9-8 Tigers’ victory. “Good opportunity to play against teammates and Fenway is pretty special.’’

Iglesias has played in a handful of games at Fenway since the Sox traded him to the Tigers in 2013, including three ALCS matchups. But no moment quite compares with Monday’s shot, his first home run at his old home ballpark and just the 10th home run of his career.

“There’s no better feeling than hitting a homer against your former team,’’ said Tigers utilityman Mike Aviles, who played with Iglesias in Boston in 2011 and 2012. “Whether it’s a feeling of hatred or a feeling of happiness, it doesn’t matter why, but when you hit a homer against your former team, it’s like, ‘Ha! I got my old teammates, like that was fun.’ ’’

Iglesias’s home run Monday gave the Tigers a 2-1 lead after Pomeranz had cruised through five innings.

“If you really break it down, it was a game-winning homer, because it put us ahead and we were able to keep that lead and keep going,’’ Aviles said. “So for a homer, it’s awesome as is, but for a homer of that stature it made it even better. I know he was excited about it and I know we were all excited about it.’’

The 26-year-old Iglesias was signed by the Red Sox as an amateur free agent in 2009. The Cuban infielder quickly moved through the Sox’ farm system, playing for Single A Lowell and Double A Portland in 2010 before beginning the 2011 season with Triple A Pawtucket.

He made his Major League debut on May 8, 2011, and appeared in 10 games for the Sox that season. He played in 25 games in the majors in 2012 and earned the job as the Red Sox’ starting shortstop for the 2013 season.

He was traded to Detroit on July 30, 2013, as part of the three-team deal with the White Sox that sent Jake Peavy to Boston.

“Unbelievable time, unbelievable organization, unbelievable fans,’’ Iglesias said of his experience with the Red Sox. “I was really blessed to be part of it.’’

Iglesias missed the entire 2014 season after suffering stress fractures in his shins, but bounced back in 2015 and was named to the American League All-Star team.

“I was fortunate enough to see him in 2011 a little bit when he was a young kid in the minor leagues, still honing his craft,’’ Aviles said. “And then in 2012 he came up a little bit and he was just getting his feet wet and really understanding the game at the big league level.

“It’s been obviously something fun to watch for me personally because I take pride in watching the game and understanding the game’s best players. And I strongly believe he’s one of the best shortstops in the game.’’

Iglesias went 2 for 4 with a walk, an RBI, and two runs Tuesday. He is hitting .261 with four home runs, 16 doubles, and 24 RBIs. He also has five stolen bases.

Aviles said Iglesias’s transformation from his time in Boston has been “night and day.’’

“I think a lot of it had to do with coming from Cuba, getting assimilated to American lifestyle, and then American baseball, because it’s obviously different,’’ said Aviles. “Plus there’s a language barrier. He had to learn and he’s a very smart kid, very intelligent kid, so he picked up the language quick. He’s able to absorb information quick and understand what’s right, what’s wrong, and believe it or not, he’s still learning how to play the game the right way.

“And that’s the fun part about it, to see how good he is and how good he’s gotten and he’s still learning the game.’’