Lambert-Smith’s next big play was even more explosive than the first.

During one of the final full-team sessions of the day, the receiver once again was on the field with Herbert — and the two linked up once again.

On a first-and 10 from their own 47-yard line, Herbert once again faked the handoff and dropped back looking to pass.

Lambert-Smith streaked down the deep of the middle field and was hit in stride for a 53-yard touchdown connection.

“Specifically with KLS, it’s one day at a time, it’s training camp,” Chargers Offensive Coordinator Greg Roman said. “He’s engaged, we just got to try to get one percent better every day. But he’s doing a nice job.”

The rookie’s big Saturday practice comes on the heels of him flashing in Thursday’s Hall of Fame Game, where he hauled in two passes for 43 yards and a touchdown.

Roman says his ability to do it in all areas of the field — underneath or going deep — is what has stood out about the receiver so far as he continues to grow each day.

“It’s not like he’s a one-trick pony, down the field guy,” Roman said on Saturday. “He’s really impressed me, he’s gotten a lot better with his route running.

“There’s still a long way to go, but he’s on that trajectory and it’s all about the mindset,” Roman added. “I think he’s really developing a great mindset.”