Putting away the Big 12 leftovers, another Mavs free agent whiff and Dak's sore shoulder

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.  Learn more about your ad choices. Visit podcastchoices.com/adchoices