The first four days of practices have been dominated by the 49ers defense this summer and that's no surprise.

Defense is often the head of the offense at this stage in training camp and the 49ers have assembled a unit for defensive coordinator,

Dameiko Ryan's, it figures to be among the best in the NFL.

The 49ers defensive line has already experienced some setbacks,

but the past rush has been relentless, led by Nick Bosa.

On the back end, free agent pickup, cornerback Charverius Ward has been as good as advertised.

Quarterback Trey Lance has made some mistakes in camp or has he.

Coach Kyle Shanahan places much of the blame of those interceptions on the individuals running the routes.

Jimmy Groplo is still around and Devo Samuel remains without a long-term contract

extension. When will those situations be resolved? We discuss those topics and much more on this episode of 49ers talk coming up right now.

Welcome to another edition of 49ers talk on NBC Sports Bay Area.com. Introducing your host, Matt Mayoko.

Yes, this is 49ers talk brought to you by Bigo Tires. I'm at May Co. She's Jennifer Lee Chan and Jennifer we are four days into 49ers training camp and Saturday was the fourth practice Sunday a day of rest.

Yes, and you know what it is?

It's been all defense.

They have had a ton of takeaways.

They've had P be used past breakups.

The defense has been dominating and I know this is the time of year where they normally do but it's very been very noticeable.

Yeah and I think that's to be expected. Maybe what I didn't expect was that it would be so noticeable that the 49ers

cornerbacks are significantly improved.

So much better. I mean, we did talk about it throughout OTA's that this is the most improved position on the team and it's evident during the first couple days of training camp.

Yeah, we'll talk a little bit later about some of those players who are standing out. I'm going to talk about a

player who hasn't stepped on the field to practice. In fact, we'll probably talk about

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