Coller Joins To Discuss Vikings Situation at Offensive Line, Replacing Michael Pierce, Retooling of the CB Position, More's Matthew Coller, formerly of SKOR North, joined's Gabe Henderson to preview Vikings training camp and what he's keeping an eye on, the young depth the team has on the o-line, how the team will retool the CB position, DT Michael Pierce opting out, the impact WR Justin Jefferson could potentially make in 2020, and more.