With just four of the 12 offensive linemen who received First or Second Team All-Pac-12 recognition last season returning in 2017, it's difficult to pin which teams return the most talent in the trenches this season. Nevertheless, that's exactly what 'Sun Devil Source Report' hosts Kerry Crowley and Chris Karpman do in the latest episode of their podcast, as the hosts break down each offensive and defensive line unit around the Pac-12. SunDevilSource's Pac-12 preview series continues with a look inside the trenches and the hosts attempt to provide listeners with broader context for what to expect from Arizona State's line play this season. Though the Sun Devils will be a work in progress along the offensive line compared to most of their conference counterparts, ASU has an excellent opportunity to rank among the Pac-12's most effective defensive lines thanks to the return of multi-year starters like junior JoJo Wicker and senior Tashon Smallwood. The goal of this week's podcast is to prepare you for the regular season and give you a glimpse of the talent each team returns in the trenches.