The Dallas Cowboys held a joint practice with the Los Angeles Rams to spice things up a bit before their preseason opener. The teams will face off this Sunday, with several storylines to follow. Can Trey Lance make a big impression on Sunday and throughout the preseason since Dak Prescott won’t play until the regular season? Which receivers will work their way further up the depth chart in the extended absence of CeeDee Lamb? As for the matter of undrafted free agents, which undrafted free agents will stand out Sunday? Perhaps the subject of today’s undrafted stock watch.