Some might argue that Adrian Gonzalez, Clayton Kershaw or Justin Turner are the Dodgers' leader in the clubhouse. Given this recent signing, Chase Utley clearly is that person. Per Peter Gammons on his blog:
It was clearly peer driven, respect from teammates, young and old, that even with the acquisition of Logan Forsythe—which was universally applauded by the Dodger players—the players lobbied Friedman and Zaidi for the return of Utley and his impact on what at times seemed to be a disjointed culture. And the powers that be listened, especially since Utley made it clear that the Dodgers were the team for whom he wanted to play.