I suspect that Daddy Shanahan told his kid to be darn picky where he signs on to be an HC because the FO and the talent they have will make all the difference in his success. \
Clearly he was going to interview with the Rams. Not saying anything would happen.
I find it fascinating that Denver passed him over, as did Buffalo and San Diego. Apparently San Fran, too, because since they were the last game in town, there would have been no hurry to interview and sign Shanny.
I'm thinking that he may not have been that "hot" with everybody.