Samantha Els, Ernie Els daughter, is a standout rugby player

Samantha Els is all grown up.

Remember the PGA Tour commercial – easily one of the best it ever made – from the early 2000s in which her famous dad, the four-time major champions, plays a math teacher adding the scores on a golf card, and Samantha (Sarah in the commercial) answers the question in her Afrikaans accent, “3 under paw.”

Samantha wasn’t just good at math. She went on to graduate from Stanford with a major in human biology and showed off her own penchant as an athlete represent South Africa’s Springbok women’s national team in rugby.

“I like joking with him, I’ll say ‘I have a green jersey now even if you don’t have a green jacket yet,’ ” Samantha told UK’s The Sun.

Samantha, 25, is the first child of Ernie and Liezl and older brother to Ben, who has autism. While he may have demanded an inordinate amount of attention, the following exchange during an interview with Golfweek suggests that Samantha received her fair share of love and affection too.

“She drove the shit out of her,” Ernie said.

“I did not,” Liezl said.

“You did,” Ernie replied. “But rightly so.”

After graduating from Stanford, Samantha worked in New York City for a year and a half. One time, Ernie visited and saw where she was living.

“I was like, ‘Man, I’m not going to say it, but this is really tough stuff,” Ernie recalled.

Not long after, Ernie got an email from Louis Koen, the head coach of South Africa’s women’s rugby team. He had seen video of Samantha competing for Stanford and the U.S. U-23 team on the internet and invited her to a camp where she’d be considered to train for the Springbok squad.

Samantha had started playing rugby in college. In her first match, she got 27 stitches. Then she cracked an ankle. As the injuries piled up, her dad asked her to stop. Samantha kept playing but not as seriously. When Ernie read the email, he had mixed feelings. Rugby is huge in South Africa and to play on the national team is the highest honor.

Ernie Els lines up a putt for his daughter Samantha Els during the Par 3 Contest prior to the start of the 2016 Masters Tournament at Augusta National Golf Club.

“I’m looking at this, and I’m like, rugby?  This is professional rugby?” Ernie said.

He sat on the email for a couple days without telling Samantha and then asked Liezl to weigh in.

“If she finds out and you didn’t tell her, you’ll absolutely be dead,” Liezl said.

So, Ernie forwarded the email to…