San Francisco 49ers LB Patrick Willis believes his troubled father can overcome his addictions and slay his inner demons - ESPN
Chris Borland - Wikipedia
Patrick Willis to be Inducted Into Mississippi Sports Hall of Fame - Ole Miss Athletics
49ers Linebacker Quits After 1 Season, Citing Safety Concerns : The Two-Way : NPR
Chris Borland retiring out of concern for head injuries
Willis Patrick - Football - Angelo State University Athletics
Why would an NFL star retire when he can still play? Patrick Willis explains why he walked away in his prime
NFL star Patrick Willis is thriving in retirement as a Silicon Valley tech worker
Willis Patrick - Football - TCU Athletics
Patrick Willis - Wikipedia