A “prized” $5,000 Rolex watch gifted by famed Yankees slugger Reggie Jackson, Miracle Met Tom Seaver and other sports legends was stolen right off their retired agent’s wrist in Manhattan on Monday, The Post has learned.

Former sports agent Matt Merola, 85, was walking alone from the post office to his East 85th Street home on Monday around 3:30 p.m. when a driver in a black sedan suddenly pulled up to him, ­police said.

The motorist chatted up Merola (inset), claiming to have a similar watch. The driver offered to show his watch if Merola showed him his — but when the octogenarian handed over his time piece, the driver sped off, leaving him holding a worthless ringer.

“I’m shocked . . . I couldn’t believe what was happening,” Merola said. “You don’t leave that quickly unless you’ve done something wrong. He seemed like a nice guy.”

Family friend Lisa Mogull said Merola was left “heartbroken” by the theft.

“It’s a personal tragedy for him because he lost his most prized possession,” Mogull said.

Jackson, Seaver, Hall of Fame pitcher Nolan Ryan and Hall of Fame quarterback Bob Griese pitched in and bought the piece — engraved with their names and jersey numbers: 44, 41, 34 and 12 — for Merola on his 70th birthday and presented it to him at Del Frisco’s Double Eagle Steakhouse in Midtown, Jackson recalled to The Post on ­Wednesday.

“We’ll get together and buy another one,” said Jackson, 73, who is now trying to track down where the watch was bought.

“We’re chasing it down, seeing if we can find a serial number,” said Jackson.

The Baseball Hall of Famer said he’s just glad Merola did not get hurt during the robbery.

“It just scares you that hopefully he didn’t get hurt. That’s what I thought when I heard about the robbery,” said Jackson.

“Watches can be replaced. We just wanted to make sure he’s all right. That’s what’s important.”

The NYPD is investigating the robbery. Officers took the thief’s watch from Merola as part of their investigation, Merola said.

Additional reporting by Ken Davidoff and Craig McCarthy