According to this, lead producer David Ortiz has quit Madden developer EA Tiberon, citing family reasons. The article quotes "inside sources", however that reckon Ortiz was becoming frustrated with the studio's internal machinations.
"David's been a valuable part of our team at EA Tiburon, and we wish him the best," said EA in a statement. "Dale Jackson, an EA veteran for more than a decade, continues to lead the Madden NFL development team."
EA Tiburon producer Phil Frazier will take over Ortiz's role, which was producing the PS3 and Xbox 360 versions of Madden.