The original book follows the fate of five people whose lives are changed forever when a routine throw made by a baseball star goes disastrously off course.
No writer is currently attached to the project, though Harbach will serve as a consulting producer.
The Social Network's Scott Rudin will also executive produce the Art of Fielding adaptation.
Rudin is currently developing another HBO pilot, newsroom drama More As This Story Develops, alongside The Social Network writer Aaron Sorkin.
HBO is also currently working on a Rob Riggle comedy called Lifestyle Lemonaid and a drama based on the novel Skinny Dip
Goldie Hawn's The Viagra Diaries, fashion comedy Spring/Fall and Darren Aronofsky's fantasy drama Hobgoblin are all in various stages of development with the cable network.
> More Television news