His feature articles, profiles and essays have appeared in more than 100 publications, including Reader's Digest, Runner's World, Sports Illustrated, Tennis and the Utne Reader. His eight books include The Fight of Their Lives: How Juan Marichal and John Roseboro Turned Baseball's Ugliest Brawl into a Story of Forgiveness and Redemption; Hank Greenberg: The Hero of Heroes, the definitive biography of the most important American Jew of the 20th century; Blades of Glory: A Story of a Young Team Bred to Win, which chronicles a season spent with a successful Minnesota high school hockey team as seen through the eyes of some of the mother's; and Hammerin' Hank, George Almighty and the Say Hey Kid: The Year that Changed Baseball Forever, an account of the 1973 baseball season. He also authored Esera Tuaolo's autobiography Alone in the Trenches: My Life as a Gay Man in the NFL.
Rosengren has won numerous awards for his books and magazine articles.
Rosengren holds a master's degree in creative writing from Boston University and a bachelor's degree from the University of St. John's. He teaches occasionally at the University of Minnesota's journalism school. He is a member of the American Society of Journalists and Authors and the Society for American Baseball Research.
- Halsey Hall SABR profile Accessed July 4, 2009