SAN DIEGO — Someday soon, visitors in Cooperstown may be able to feast their eyes on a memento from a shot heard ’round social media.

Bartolo Colon has been contacted by the Baseball Hall of Fame, which hopes to procure a piece of the 42-year-old Mets pitcher’s first career home run. He is deciding what to contribute.

After his historic blast against the Padres on Saturday night — his first homer in 247 career at-bats spanning nearly two decades — Colon said he will be keeping the 28-ounce bat he used and the ball he hit over the leftfield fence. He might donate his cap but not his spikes, because he owns only one pair.

StoryBartolo Colon homers as Mets beat PadresPhotosPhotos: Round the bases with Bartolo on his HRPhotosBartolo Colon's Mets at-bats

Despite his career night at the plate, Colon still has some milestones to check off his list. Now a lifetime .092/.099/.114 hitter, Colon has yet to draw a walk in 249 big-league plate appearances.

Still, he apparently has grown comfortable with his new standing as a slugger.

Matt Harvey got some advice from Colon after just missing a homer of his own and settling for a double off the centerfield fence in Sunday’s 4-3 win over the Padres. “He kept saying that I need to hit the weight room,” Harvey said. “Add that into the mix of working toward things this week.”

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Walker bruised and waiting

Neil Walker could be held out of the starting lineup as he waits for his badly bruised right shin to fully heal. He was limited to pinch-hitting duty Sunday and struck out in the eighth inning against the Padres, extending his drought to 0-for-20.

Within a span of 36 hours, Walker fouled off a pair of pitches that struck the exact same spot on his right leg, just above the shin guard he used to protect against such dangers. The first came on Thursday and the next on Saturday, during his first plate appearance.

“It was just terrible luck,” Walker said. “It was the exact same pitch, exact same location and exact same result, so hopefully it won’t happen again.”

Walker played through the issue on Saturday night though manager Terry Collins said it left the second baseman “pretty banged up.”

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Said Collins: “I don’t think it’s worth the chance to run him out there.”

No carry-over

The Mets face the Dodgers on Monday night for the first time since Chase Utley’s takeout slide left shortstop Ruben Tejada with a fractured leg in the NLDS.

But David Wright doesn’t expect any lingering ill will on behalf of Tejada, who was released in spring training.

“Us getting back at them was beating them and sending them home,” said Wright, who helped the Mets beat the Dodgers in five games.