The D-backs joined the rest of Major League Baseball on Sunday by swinging pink bats and wearing pink wristbands on Mother's Day.
Roberts took things a step further with his pink spikes.
"This is my first year to be able to do it," Roberts said. "To be able to play a sport that gets attention and use it to recognize mothers, as well as an important cause, is real cool."
Roberts and his wife Kim have a young daughter, Hudsyn.
"For me, I think sometimes being a mom gets overlooked," he said. "I mean, man, that's a tough job. In the offseason, I get a taste of it for a few days -- and it's not easy."
Outfielder Justin Upton used a pink bat to double in the eighth inning. He eventually came around to score to pull the D-backs to within 4-3.
"It's for a great cause," Upton said. "For us, being on TV and being able to raise awareness of breast cancer is awesome. On top of that, we get to honor our mothers -- the people who brought us into this world -- and let them know how much we care about them."