The meeting came just hours after Nicklaus revealed he had tested positive for coronavirus at the onset of the pandemic.

Nicklaus and his wife, Barbara, turned 80 a month apart at the start of the year.

He said his wife had no COVID-19 symptoms, while Nicklaus had a sore throat and a cough.

Nicklaus said they were home in North Palm Beach, Florida, from March 13 "until we were done with it" on about April 20.

"It didn't last very long, and we were very, very fortunate, very lucky," Nicklaus said during the CBS telecast of the event he hosts annually.

"Barbara and I are both of the age, both of us 80 years old, that is an at-risk age.

"Our hearts go out to the people who did lose their lives and their families.

"We were just a couple of the lucky ones."

"It didn't last very long, and we were very, very fortunate, very lucky." – Jack Nicklaus

The Memorial had no spectators and Nicklaus sightings were rare because of protocols in the PGA Tour's return to golf amid the pandemic.

Nicklaus shared the news when the Memorial was coming out of a weather delay in the final round.

The few times he was seen, he was wearing a mask and keeping his distance.

Nicklaus had a remote press conference on Tuesday and said he would shake the hand of whoever wins the Memorial, a tradition at the tournament he created.

"If they don't want to shake my hand, that's fine, I'll give them a fist bump or an elbow bump, but I'm not going to give them COVID-19, so that's ... I wouldn't put anybody in that position," he said.

He said again on CBS that he'll shake hands if the winner wants to, but he would be fine if the winner doesn't.

After a brief moment of indecision with Rahm, it was a fist bump.

"I've been dreaming of that handshake many times," Rahm said.

"Well, it was a fist bump because of the situation, but still, how many people can say they got a congratulatory fist bump from Jack Nicklaus?"

- Theo Katsaros, Associated Press