An East Valley Tribune story linked in the "620 Sports First Hire Is..." thread stated that KMVP 860 would be a simulcast of KT'R 620. Didn't say for how long, and one may assume that it will still be the overflow freq. when two games air at the same time, or overlap, with the low man on the totem pole getting dumped to 860.
(Not sure if the term "low man on the totem pole" is now politically incorrect, so I will apologize in advance to all who might have been offended, and will begin diversity training at the Gov. Nappy School of PC, sponsored by the Arizona Socialist Republic ;D).