Fred Warner

For the past four-to-six weeks, key injuries have done nothing to disrupt the methodical drum beat of the 49ers’ still undefeated season.

When teams line up against the 49ers’ front six of Nick Bosa, DeForest Buckner, Arik Armstead, Dee Ford, Kwon Alexander and Fred Warner, they’re in for an extraordinarily bad time.

Here’s what to look for on Monday night, when the 49ers play the Denver Broncos in their second preseason game.

Another day, another poor showing from Jimmy Garoppolo.

The instigator of Kyle Shanahan’s unsportsmanlike conduct penalty? Russell Wilson.

San Francisco’s top options at middle and weak-side linebacker have been asserted. It’s likely to remain that way for seasons to come.

The 49ers allowed three touchdowns on third down in their 29-27 loss to the Los Angeles Chargers.

The 49ers converted one of four red zone trips into touchdowns last Sunday. That’s a point of emphasis as they prepare for the Detroit Lions in the home opener Sunday.

Among the nine players who made their 49ers debuts Sunday, two in particular stood out: Fred Warner and Richard Sherman.

All of the 49ers’ top three draft picks were expected to play important roles in their rookie season, but not under recent circumstances.