The long-rumored Dodgers trade with the San Diego Padres went through today.

To the Padres: Matt Kemp, catcher Tim Federowicz and $32 million.

To the Dodgers: Catcher Yasmani Grandal, pitchers Joe Wieland and Zach Eflin.

To the fans: The sinking feeling that the erratic but talented Kemp will come back to haunt them while playing for the Padres.

New Dodgers management — Andrew Friedman, president of baseball operations and general manager Farhan Zaidi — would seem to be convinced Kemp is done, or will be in the short term.

Grandal looks like a part-time player, though he did hit 15 homers last year; he also already has done a 50-game suspension for failing a drugs test. Wieland has been knocked around in two short stays in the bigs, and Eflin will be sent to the Phillies as part of the deal bringing shortstop Jimmy Rollins to Los Angeles.

This was mostly about the Dodgers not wanting to pay Matt Kemp, 30, the final five years of that eight-year, $160-million contract … as well as being convinced they have more than enough outfielders, including hot prospect Joc Pederson, who will play center field.

Matt Kemp used to drive me to distraction. A great physical talent, but his decision-making often seemed poor. He ran bizarre routes to catch flyballs, struck out a lot and made lots of mistakes on the basepaths. He didn’t seem an instinctive player or one who gave much thought of the game. I once called him a “dolt” on this blog.

The thing about Kemp is … if he is not done — and the trade apparently was held up a week so the Padres could check out what USA Today reported to be arthritic hips — he is the kind of player who can hurt you with one swing.

He is coming off his best year since his outstanding 2011 season, when he should have been the National League MVP. The second half of 2014, he hit 17 home runs and drove in 54 runs and had the highest slugging percentage in the majors during that span.

He didn’t look done last September, certainly.

The Dodgers not only traded Kemp for not much of anything, they are paying the Padres to take Kemp off their hands. They will contribute $32 million to the final five years and $107 million on his current contract.

So, how annoying will it be if Kemp helps the Padres, who always play the Dodgers tough, beat them even more often?

I already have predicted at least two game-winning hits in 2015 by Kemp against the Dodgers.

I suppose Dodgers fans should be glad the club is no longer stuck with $75 million of Kemp’s remaining contract. Money that would go to a guy who has a history of shoulder and hamstring problems (and apparently hips that are a mess) … Money that would go to a player sometimes considered less than a positive presence in the clubhouse.

Just saying … that wasn’t Dee Gordon, a slap-hitting shortstop, they traded to the Padres. And that wasn’t the Cleveland Indians they sent him to.

They traded a guy who can put baseballs in the seats, and could begin doing so quite soon for one of the Dodgers’ bitter enemies and a division rival.

However much Matt Kemp has left, doesn’t it seem likely he will do much of it while playing against his former team? The potential for seller’s remorse seems pretty high.