Linda Christensen, diagnosed with breast cancer on Nov. 1, 2011, during a routine mammogram, threw out the ceremonial first pitch. She was treated at Advocate Lutheran General Hospital, and on Nov. 1, 2012, doctors said she was clear of cancer. The anthem was sung by 40 members of the "Sing to Live" community chorus, comprised of singers whose lives have been touched by breast cancer. Three breast cancer survivors -- Victoria Leyva-Amick, Sheila Eramus and Gina Zilz -- led the singing of "Take Me Out to the Ballgame" during the seventh-inning stretch, as well.
Ally Fairfield was selected as the honorary bat girl, part of Major League Baseball's "Going to Bat Against Breast Cancer" campaign. Fairfield was diagnosed with Stage 3 invasive ductal carcinoma, an aggressive breast cancer, at the age of 23. She's undergone numerous surgeries, a bilatera mastecomy, chemotherapy treatments and radiation treatments.
"No matter what I'm going through, how much pain I'm in, or how sick I am, I know that somewhere out there is someone who is worse off than I am, and whatever it is I am going through, I know I can overcome it," she wrote. "Having a positive attitude has helped me tremendously throughout my journey."
A huge Cubs fan, Fairfield is particularly fond of Chicago first baseman Anthony Rizzo, who also is a cancer survivor.
On Mother's Day this Sunday, Major League Baseball teams will use pink bats to raise awareness for breast cancer. The Cubs will be in Washington that day to play the Nationals.
Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings, and you can follow her on Twitter @CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.