Martinez reportedly died due to a heart attack while receiving dialysis. The coach, who also worked at the College of San Mateo, had been ill for quite some time and was waiting for a kidney transplant.
He died on his birthday.
Martinez touched many lives as a coach and mentor to young athletes, a list that not only includes Brady but fellow Bay Area native and Patriots wide receiver Julian Edelman.
The Associated Press story on Martinez' death can be found here.
A more personal tribute from a San Jose Mercury News writer can be read here.