The players' uniforms, batting gloves, wrist bands, bats and cleats are among items to be auctioned to raise funds in the fight against breast cancer.
These are one-of-a-kind memorabilia that has special meaning to the players and those acquiring them.
Authentic game-used Louisville Slugger pink bats and other gear from Mother's Day games will be auctioned exclusively at MLB.com, with proceeds benefiting the fight against breast cancer. The complete Mother's Day collection -- which includes the special caps and jerseys being worn by players on Sunday -- is available at the MLB.com Shop.
"I think all us have had a mother, grandmother or some maternal figure in our life that has been greatly impacted by breast cancer,'' Padres manager Andy Green said. "Any day we can pay homage to that person, and the love and respect shown through what we wear, we are going to do it, and it ends up being great for breast cancer awareness as well.''
What once was restricted to pink bats has grown to include about everything the players, coaches and managers wear.
"It's everything now,'' a pleased Green said. "You get the pink camo uniforms, Under Armour has certain kinds of shoes, New Balance has a shoe -- everybody has a shoe now for this day.''
But MLB isn't putting its feet up. It's full speed ahead on spreading breast cancer awareness.
"It's all about my mom,'' he said. "Your mom is your mom and we wear this once a year, but it should be every day. It means a lot. I know my mom has been texting me like crazy and has been happy that I'm working.''
But the day means more to Bethancourt than acknowledging his mom. Cancer has struck those close to him.
"My mom's girlfriend, she's out with cancer now, '' he said. "And my sister's girlfriend, she passed away four years ago from cancer. So it also means a lot like that, too.''
Jay Paris is a contributor for MLB.com based in San Diego. This story was not subject to the approval of Major League Baseball or its clubs.