John Feinstein, the longtime sportswriter and columnist for the Washington Post and a bestselling author, died Thursday. 

Feinstein was 68 years old. 

The Washington Post said Feinstein died at his brother Robert’s home in McLean, Virginia. 

CLICK HERE FOR MORE SPORTS COVERAGE ON FOXNEWS.COM

John Feinstein on the Golf Channel during the first round of The Players Championship on The Players Stadium Course at TPC Sawgrass May 11, 2017, in Ponte Vedra Beach.  (Cy Cyr/PGA TOUR)

The cause of Feinstein’s death has not been disclosed. 

Feinstein had filed a column for The Washington Post one day before his death about Michigan State head basketball coach Tom Izzo. 

JUNIOR BRIDGEMAN, EX-NBA STAR AND BILLIONAIRE BUSINESSMAN, DEAD AT 71

Feinstein’s career at The Washington Post began in 1977, but it had nothing to do with sports at first. He was a night police reporter, but he “soon distinguished himself on the sports beat,” according to the outlet’s obituary. 

“He covered a wide range of sports and developed a talent for deep sourcing that fed personality-driven and dramatic narratives about athletes, coaches and management,” the obituary continued. 

While working for The Washington Post, Feinstein was also doing work for ESPN, NPR and the Gold Channel. He also had shows on SiriusXM. 

Feinstein also wrote more than 40 books, including the bestselling basketball book of all-time, “Season on the Brink,” which debuted in 1986 after he took a full year off from his Washington Post gig to follow the 1985 Indiana Hoosiers and their polarizing head coach, Bob Knight. 

Author John Feinstein watches the action between the Pittsburgh Steelers and Baltimore Raves from the Ravens’ bench area at Heinz Field Dec. 26, 2004, in Pittsburgh. (George Gojkovich/Getty Images)

The book was a huge success, spending 17 weeks as the No. 1 bestseller after its release. And experts and casual readers alike loved how Feinstein didn’t leave out a single detail about how Knight went about coaching his players during a season with an NCAA Tournament appearance but not a national championship. 

The Hoosiers won Knight’s third and final national title as head coach of Indiana during the 1986-87 campaign. 

The book was eventually adapted into an ESPN TV film, premiering in March 2002.

Feinstein is a 23-time New York Times Best Seller who achieved the milestone of publishing his 50th book, “The Ancient Eight,” which goes deep into Ivy League football. The book was released last year. 

It was announced in November that Feinstein would join Longwood University as a broadcaster and teacher, providing color commentary for ESPN+ broadcasts of men’s basketball games. 

John Feinstein of the CBS Sports Radio Network  broadcasting from Radio Row in New Orleans during the 2013 Super Bowl.  (John Paul Filo/CBS via Getty Images)

CLICK HERE TO GET THE FOX NEWS APP

Feinstein’s achievements have been recognized with numerous awards and inductions, which include the Naismith Basketball Hall of Fame and the National Sportswriters and Sportscasters Hall of Fame. 

Follow Fox News Digital’s sports coverage on X, and subscribe to the Fox News Sports Huddle newsletter.