After the USFL folded, Walker joined the NFL with the Dallas Cowboys, earning consecutive Pro Bowl and second-team All-Pro honors from 1987 to 1988.

Outside of football, Walker was a member of the United States' bobsleigh team at the 1992 Winter Olympics and pursued business ventures in food processing.

Walker launched his first political campaign in Georgia's 2022 Senate election, which he lost to Democratic incumbent Raphael Warnock.

[9][10] Walker attended Johnson County High School in Wrightsville, where he played football, basketball, and competed in track.

[citation needed] In his 2008 autobiography, Walker wrote that he was the Beta Club president and class valedictorian at Johnson County High School.

[20] As a freshman, he played a major role in helping Georgia go undefeated and win the de facto national championship with a victory over Notre Dame in the Sugar Bowl.

[19] Walker signed with the New Jersey Generals in 1983, owned by Oklahoma oil tycoon J. Walter Duncan, who after the 1983 season sold the team to Donald Trump.

[citation needed] Walker rushed for the game-winning touchdown with a minute to play in the 31–28 victory against the New York Giants in the season opener.

[23] In 1987, Walker complained to Cowboys management about being moved around between three different positions (running back, fullback, wide receiver) and that Dorsett had more carries.

He received three standing ovations from the record Metrodome crowd of 62,075, producing a Vikings win after four successive losses and 14 of the prior 18 games with the Packers.

[43] He began a 12-week training camp with trainer "Crazy" Bob Cook at the American Kickboxing Academy in October 2009 in San Jose, California.

[44] In his MMA debut on January 30, 2010, Walker defeated Greg Nagy via technical knock-out due to strikes at Strikeforce: Miami.

[51] He founded Savannah-based H. Walker Enterprises in 2002 as an umbrella company for most of his other business ventures, the largest of which was Renaissance Man Food Services.

[52] Walker has a history of exaggerating the number of people employed by and the assets of his companies; the failure of several business enterprises led to creditors bringing lawsuits.

[52][53] Walker touted Renaissance Man Food Services as one of the largest minority-owned meat processors in the nation, with $70 million in annual sales.

[52][51] In subsequent deposition testimony in a lawsuit, however, Walker gave far lower figures, saying that his company averaged about $1.5 million in annual profits from 2008 and 2017.

[73] Previously, in 1989, Walker told the media that he "had fun" while attending an FBI school in Quantico for a week, speaking of an "obstacle course and you shoot at targets".

[79] The New York Times described Walker's demeanor throughout the debate as "aggressive and persistent," with his frequent interruptions of Warnock and mocking of him for dodging questions.

[92] Walker alleged that there was "country-wide election fraud" and urged Trump and "true patriots" to carry out "a total cleansing" to "prosecute all the bad actors".

[92] Walker also spread a conspiracy theory about the 2021 United States Capitol attack, suggesting it was a "well-planned" distraction from election fraud.

[98] In September 2022, Walker endorsed legislation proposed by Senator Lindsey Graham that would ban abortion after 15 weeks of pregnancy nationwide, except in cases of rape, incest, and threat to the life of the patient.

[99] During his October debate with Raphael Warnock, Walker softened his position on abortion,[100] saying he supported the Georgia law allowing exceptions for rape and threats to the mother's life and health.

[107][108] Within a week of the original allegations' publication, The New York Times interviewed the same woman, as well as her friend, corroborating the reporting by The Daily Beast.

[110] In an October 26, 2022, press conference organized by attorney Gloria Allred, a second woman, who has not identified herself, alleged she had been pressured by Walker to get an abortion in 1993 after a years-long extramarital relationship with him.

"[75] In August 2022, in response to questions about the passage of the Inflation Reduction Act of 2022, which includes funding to counteract climate change, Walker said, "They continue to try to fool you that they are helping you out.

Possibly referring to a provision that allocated $1.5 billion to the U.S. Forest Service's Urban and Community Forestry Program, Walker added, "Because a lot of money, it's going to trees.

[119] Walker also discussed transgender children in general, stating, "they're telling the young kids in school, you can be a boy tomorrow even if you're a girl...

[53] Walker stated that he does not remember the assault or the threats and attributed his aberrant behavior with his wife and others to his dissociative identity disorder for which he was diagnosed in 2001.

[141][53] In January 2012, a woman, Myka Dean, made a report to Irving, Texas, police that when she attempted to end a 20-year "on-off" relationship with Walker, he "lost it" and threatened to wait at her home to "blow her head off".

[145][146] Walker has spoken publicly about being diagnosed with dissociative identity disorder and has served as spokesperson for a mental health treatment program for veterans.