A quick check of various sources didn't help much. The Sports Byline USA network, which had been feeding 1550 for most of its operating hours, is still up and running. KMRI's website still has the "SLC Sports Radio" logo and little else (unless they have a new website that I can't find yet).
Unless it actually lasted less than a year, the local Dino Costa show would be on the air as I write this if they were still intending to continue the Sports format. If the stream is the actual on-air programming, that is not the case.
Of course, up until a year ago, their continued existence was not very assured. (See Wikipedia.)
I presume "no announcements of any kind" does not preclude them saying "KMRI West Valley City" once an hour.