Breslow will take his tour from 11 a.m. to noon.
Later on, Breslow will share the A's mound with 13-year-old oncology patient Hudson Davis from Children's Hospital Oakland, who will throw the ceremonial first pitch of the A's game against Texas at 7:05 pm.
Breslow, who graduated from Yale with a degree in molecular biophysics and biochemistry, put his plans for medical school on hold when he was drafted by the Milwaukee Brewers in 2002.
Jason Turbow of the Wall Street Journal described him as the "smartest man in baseball."
According to the research center, Breslow was always interested in medicine as a child and his passion became all the more personal when his older sister Lesley was diagnosed with pediatric thyroid cancer.
Breslow's sister has been in remission for 15 years and last year he founded the "Strike 3 Foundation" in hopes of heightening awareness, mobilizing support and raising funds for childhood cancer research.
Breslow will meet with Dr. Bert Lubin, senior vice president of medical research, and Dr. Julie Saba, senior scientist, who will provide an overview of the growth research efforts of the eight centers that comprise the Children's Hospital Oakland Research Institute.