Jim Harbaugh's NFL coaching tree appears to be blossoming.Sunday, Harbaugh became the third NFL coach (along with his brother John and Barry Switzer) to win a playoff game in his three seasons as a coach, and Monday, an expected development came to fruition as teams began to ask permission to talk to San Francisco assistants for head-coaching jobs.ESPN's Adam Schefter reported that Minnesota and Washington asked permission to interview offensive coordinator Greg Roman and that Washington asked permission to talk to defensive coordinator Vic Fangio.