<p>Tim and Matt Barrows answer listener questions about adding a defensive lineman, the electrical substation, Al Guido and tell some old stories about Mike Nolan and Mike Singletary.

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Tim and Matt Barrows answer listener questions about adding a defensive lineman, the electrical substation, Al Guido and tell some old stories about Mike Nolan and Mike Singletary.

Mailbag: Changes on Defense, Old Nolan & Singletary Stories

BREAKING: 49ers Plus Minus now has its own feed! The Athletic’s Matt Barrows plugs listeners into the Niners’ locker room, personnel interviews, and the latest news &amp; notes to keep you up-to-date on the 49ers. New Episodes drop every Gameday, Tuesday, Thursday, and&nbsp;Friday.

Sports

BREAKING: 49ers Plus Minus now has its own feed! The Athletic’s Matt Barrows plugs listeners into the Niners’ locker room, personnel interviews, and the latest news & notes to keep you up-to-date on the 49ers. New Episodes drop every Gameday, Tuesday, Thursday, and Friday.

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Mailbag: Changes on Defense, Old Nolan & Singletary Stories

Mailbag: Changes on Defense, Old Nolan & Singletary Stories

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