SportsDay Insiders Kevin Sherrington, David Moore and Evan Grant each give the Big 12 schools abandoned by Texas and Oklahoma a future, whether through expansion or in other conferences [4:19]. New GM Nico Harrison couldn't deliver the Mavs' their top free agent target, Kyle Lowry, so the onus is on Jason Kidd to make sure Kristaps Porzingis is a legitimate second option [16:80]. And Dak Prescott's sore shoulder is the low point of training camp so far. The high? Well, you've gotta listen [27:27]. Find more ‘Dallas Morning News’ audio and a special membership offer for listeners at dallasnews.com/listen.