In case you've been living under a rock, Madison Bumgarner and Yasiel Puig don't really like each other.

Their rivalry developed over the last six seasons while Puig was a member of the Dodgers.

But if you thought their feud would cool down with Puig now on the Cincinnati Reds, you were mistaken.

Exhibit A: Sunday afternoon at Oracle Park.

In the top of the sixth inning, Puig hit a 91 mph fastball from Bumgarner 388 feet for a solo home run.

Blondes have more fun!#BornToBaseball pic.twitter.com/rcAhi44crA

— Cincinnati Reds (@Reds) May 12, 2019

#Reds 4 @ #SFGiants 2 [T6-0o]:

Yasiel Puig homers (7): fly ball to LCF (solo)

Hit: 388.17ft, 103.14mph, 33.48°🚀

Pitch: 91.7mph Two-Seam Fastball (LHP Madison Bumgarner, 8) pic.twitter.com/srJ5m0pLVX

— Home Run Tracker (@DingerTracker) May 12, 2019

Puig has never faced a pitcher more than he has Bumgarner. In 46 career at-bats against the Giants ace entering Sunday, Puig had just two home runs. Now he has three.

After the Giants' comeback 6-5 win over the Reds, Bumgarner was asked about Puig's latest home run.

Bumgarner on Puig’s homer on a fastball in: “He’s a quick study. It only took him seven years to learn how to hit that pitch.”

— Andrew Baggarly (@extrabaggs) May 12, 2019

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Ouch.

Puig got the first laugh on Sunday, but Bumgarner got the last.

With Sunday's game being the final time the Giants and Reds will meet during the regular season, we won't get to see the two players face each other again in 2019 ... unless the Giants trade Bumgarner in July.

The Giants added a veteran shortstop Tuesday when they acquired Zack Cosart and prospect Will Wilson in a trade with the Angels for a player to be named later or cash considerations. Wilson was the prize of the deal, but there remains a possibility that Cozart could play a considerable role in San Francisco's middle infield this coming season.

As it turns out, though, the Giants reportedly went after a different veteran shortstop before pursuing the trade with the Angels. Didi Gregorius signed a one-year, $14 million contract with the Phillies on Tuesday, and according to NBC Sports Philadelphia's Jim Salisbury, Gregorius reportedly chose them over the Giants in part due to the presence of Phillies manager Joe Girardi.

Heard Gregorius chose Phillies over Giants and Brewers. Playing for Girardi again was big factor in decision.

Segura has played second base before. That is likely landing spot for him with Kingery at third, but Phils will consider all options in spring training.

— Jim Salisbury (@JSalisburyNBCS) December 11, 2019

Gregorius previously played under Girardi with the Yankees, and it would appear they enjoyed their time together. While his offensive numbers might have been inflated somewhat by Yankee Stadium, Gregorius remains a standout defender and he was worth at least four WAR in both 2017 and 2018.

[RELATED: New Giants prospect Wilson already hates rival Dodgers]

The Giants absorbed the entirety of the $12.67 remaining on Cozart's contract, so there isn't much of a price difference between he and Gregorius. That said, the fact that San Francisco was able to acquire the Angels' No. 4 ranked prospect along with Cozart likely made that the more prudent acquisition.

Heading into free agency, the Giants made it clear that Madison Bumgarner had earned the right to go anywhere he wanted. A couple days into the Winter Meetings, that sentiment likely remains the same, but they'd be lying if they said they didn't have a preference where he ended up.

Now that Gerrit Cole reportedly has agreed to a record-breaking nine-year contract with the New York Yankees, San Francisco apparently inched closer to its greatest nightmare.

The rival Dodgers were considered to be a finalist for Cole, and apparently they didn't waste any time pivoting once the news broke. Giants fans really, really, really won't want to hear the direction in which Los Angeles reportedly is pivoting, though, according to MLB Network's Ken Rosenthal.

#Dodgers will now shift their focus to free-agent left-hander Madison Bumgarner, sources tell The Athletic.

— Ken Rosenthal (@Ken_Rosenthal) December 11, 2019

If you need to go rinse the vomit taste out of your mouth, go for it. You're certainly not the only Giants fan doing so.

After everything Bumgarner achieved in San Francisco, it's unbearable to think of him exchanging his orange and black for Dodger blue. I mean, think of all the run-ins Bumgarner has had with LA over the years. Yaisel Puig. Max Muncy. Go get it out of the ocean? How about we just get this rumor out of here.

Yuck.

[RELATED: New Giants prospect Wilson already hates rival Dodgers]

Bumgarner is expected to receive a contract in excess of $100 million, and the Dodgers certainly have the ability to afford him. So do the Giants, though, and as NBC Sports Bay Area's Alex Pavlovic notes, they might be forced to revisit the situation due to their rival's reported interest.

Giants have been preparing to move on without Bumgarner, but I’ve got to think they revisit those plans if Dodgers show serious interest. They’re well aware that fan base is pissed and that those emotions matter.

— Alex Pavlovic (@PavlovicNBCS) December 11, 2019

And guess which two teams face each other on Opening Day?

The Giants are used to seeing MadBum take the mound on the first day of the season. For the sake of all that is good and holy, let's hope they don't have to learn what it's like to go against him in that situation.