Robert Guerrero knows pressure, and it's not fighting Floyd Mayweather Jr.

Guerrero had to leave boxing for 15 months after his wife was diagnosed with leukemia. Guerrero says the experience of taking care of her will help him defeat the unbeaten and heavily favored Mayweather.LAS VEGAS -- Robert Guerrero is from Gilroy, California's garlic capital of the world. His greatest fight stages have been in San Jose and Ontario. And his most compelling pre-fight publicity stop was on evangelist Pat Robertson's "700 Club."