49ers position battles: Wide receiver, tight end and secondary

Matt Maiocco and Jennifer Lee Chan break down the latest surrounding Brandon Aiyuk and his 49ers negotiations, when fans should start worrying about Trent Williams' absence and who could suit up this weekend in San Francisco's second preseason game. Then, Matt and Jennifer switch their attention to some positional battles and predict who they think will make the final 53-man roster.(1:26) 49ers announce schedule change amid rash of injuries(7:19) Latest with Aiyuk and the 49ers(13:50) Williams continues holdout as training camp goes on(21:30) Could Taylor be the punt returner this season?(26:08) Hufanga set to return to practice field(32:36) Turner released by 49ers