"Teammate" by David Ross, with Don Yeager, is a signed first edition nonfiction book published in 2017 by Hachette Books. The book, focused on the baseball genre, is intended for an adult audience and features illustrations and a dust jacket. The author's narrative offers a unique perspective on the world of sports, specifically highlighting the importance of teamwork and dedication in baseball. This signed copy adds a special touch for collectors and fans of the sport.