Marcus Spears breaks down why Shedeur Sanders' preseason opener vs. the Panthers is a crucial chance to rise from fourth on the Browns' depth chart. (1:20)Open Extended ReactionsThe Cleveland Browns are expected to start rookie Shedeur Sanders at quarterback for the team's preseason opener against the Carolina Panthers on Friday, sources told ESPN. Flacco has gotten the most reps with the team's starters at camp. The Browns begin joint practices with the Panthers in Charlotte, North Carolina, on Wednesday before facing off in Friday's game. Cleveland.com first reported news of Sanders' expected start.