Keith O'Neil

About the Author

Keith O'Neil is a former professional football player whose career spanned over a decade in the NFL, where he played as a linebacker for teams including the Indianapolis Colts and Chicago Bears. Diagnosed with bipolar disorder early in life, O'Neil has channeled his experiences into advocacy and writing, shedding light on the mental health struggles often hidden behind the tough exterior of athletes. In his memoir 'Under My Helmet: A Football Player's Lifelong Battle with Bipolar Disorder,' he offers an unflinching look at the highs and lows of living with the condition while navigating the high-stakes world of professional sports. Now a mental health advocate, O'Neil speaks to audiences worldwide, promoting awareness and reducing stigma around mental illness in sports and beyond.