Brock Purdy opens up about his game-day philosophy as San Francisco surges toward the playoffs after a big win over the Titans.

The Bay Area broadcast icon is hopeful of resuming his role as radio voice of the 49ers for the last two games of the regular season as he recovers from leukemia that was diagnosed in July, leaving him hospitalized for 23 days and in fear for his life.

The NFL world was stunned when the Indianapolis Colts, desperate for quarterback options, lured 44-year-old Philip Rivers out of retirement. The veteran, now a grandfather, is reportedly going to start over rookie Riley Leonard against the Seattle Seahawks on Sunday.

Christian McCaffrey is expected to play vs. the Titans on Sunday, a source said, despite being added to the injury report as questionable.

The 49ers are didn't overwhelm the Titans in the first half, but they do lead 17-10 at halftime. San Francisco outgained Tennessee 179 to 173. Brock Purdy has completed 10 of 15 passes for 135 yards and a touchdown.