It also meant a lot that his mother, Derry, had been flown in from Louisiana for the occasion. Each year the Phillies have a drawing to see which player's mother will be brought in and this year it was Pierre.
He joked that he didn't need to have a good game for her, though.
"Mom doesn't care if you're 0-for-4, she still loves you no matter what. You're always a hero in mom's eyes, man. That's why moms are so special. Everybody needs them," he said with a laugh. "But it was good for her to be here and enjoy it."
Even before the game, wearing a pink sweater in honor of the occasion, she was thrilled to be in town. "This is awesome. We're on cloud nine. It's a great honor to be here on Mother's Day. We're so proud of him," she said.
She's see her son play before. But this was even more special.
"It's almost like when I went to the first game he ever played. I feel like that. Because I just couldn't believe it. And being down on the field [for a pregame ceremony], it's just amazing," she said. "[And seeing him use the pink bat] makes it even better. The idea of a pink bat for mothers all over."