Blue Bloods creators and executive producers Mitchell Burgess and Robin Green have parted ways with the series, Deadline reports.
The married writing team reportedly left over creative differences. According to Deadline, CBS wants to make the show more procedural and less character-driven.
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This is the second showrunner exit on the freshman series. Former Numb3rs executive producer Ken Sanzel left the show in August after reported differences with star Tom Selleck.
Prior to Blue Bloods, Burgess and Green were executive producers on The Sopranos. Burgess won three Emmys and Green won one for their work on the HBO drama.
Watch full episodes of Blue Bloods
Burgess and Green courted controversy when Blue Bloods was credited as "from the executive producers of The Sopranos." Shortly after CBS picked up the series in May 2010, HBO sent a cease-and-desist letter to CBS requesting that the network stop using the Sopranos credit, according to New York Magazine's Vulture.
Despite the behind-the-scenes differences, Blue Bloods has been a winner for CBS. Airing Fridays at 10/9c, the series has averaged 12.3 million viewers.
CBS is currently on the lookout for a new showrunner for Blue Bloods.
A network rep could not immediately be reached for comment.