It seems as if the Chiefs are always asking defensive end Tyson Jackson to learn something new.

When Jackson was the Chiefs’ first-round pick in 2009, he had to make the conversion from an end in a 4-3 defense at LSU to a left end in a 3-4 scheme in the NFL.

It took a few frustrating years, but just when Jackson felt comfortable in his role as a run stopper on first and second downs, the Chiefs decided late last season to keep him in the games on passing downs. Jackson responded with three sacks in a four-game span — which was one more sack than he had produced in his first three-and-a-half seasons.

And now, here comes another new defensive system, and though it is still a 3-4 front, the terminology and philosophies are new. Again.

“It’s football, and it’s never the same,” Jackson said. “With new coaches coming in, they’re bringing their own system in. There are a lot of moving parts, and there’s a learning curve you have to go through and learn what they’re trying to teach you.

“We’re doing a whole lot of moving. We’ll be flip-flopping from right side to left side. It’s our job to understand what they’re asking of us, what our gap responsibilities are on each play. You would be amazed how just walking through plays will help you get things down pat, where you should be on each play … on what blitz you need to pick what hole …”

Jackson gave a stunning demonstration on how well he’s picking up the new defense during a six-play sequence in last Thursday’s offseason practice session.

Jackson, a 6-4, 296-pounder, leaped high and swatted two passes in four plays by quarterback Alex Smith. Two plays later, he crashed through the line and would have been credited with a sack if full contact were allowed in practice.

“I’m very impressed with Tyson,” said new head coach Andy Reid. “I’ve been impressed since we’ve been together here. Not many guys are going to outwork him on the field. Pass rush was not his forte, but he’s working like crazy to get better. As a coach, that’s all you can ask for. He’s a big man who can move a little bit.”

While Jackson finally found a comfort zone last season, he’s learning some new tricks from veteran defensive line coach Tommy Brasher, who has developed several top pass rushers in his coaching career, including Hugh Douglas at Philadelphia and Michael Sinclair at Seattle.

“Finishing off last season the way I did will be real helpful for me coming into this season,” Jackson said, “and starting off the season the same way by being disruptive on third down. Working with coach Brasher, he’s been around the game for such a long time, he’s got a lot of experience and is sharing things and insights that will pay off this year.

“When it comes to the fundamentals, things stay the same, but coaches have their own twists, and it’s our job to pick up on that and learn from that and make ourselves better as players.”