In his first Origin series, Walker is the bookmakers' favourite to clinch the Wally Lewis Medal, having been named man of the match in the Maroons' big game-two win.
The Sydney Roosters star had also looked on track to clinch man-of-the-match honours on debut in the series opener, until Kalyn Ponga's send-off tipped the game in the Blues' favour.
With his crafty short kicking and excellent game awareness, Walker again shapes as crucial for the Maroons at Suncorp Stadium next Wednesday.
As the second-rower lining up on Walker's edge, Canberra star Young says it's in his job description to make sure the halfback feels the heat.
"That's my job, as a back-rower, he's the opposite half," Young said.
"I like going after blokes and stirring them up. That's just the way I've always played. I think in Origin you can do that a little bit more than the NRL.
"That's the way the game's built on and that's the way I'll play."
After poor starts to the season with Melbourne, Maroons hooker Harry Grant and five-eighth Cameron Munster have recaptured their best form this series.
Queensland fullback Ponga has shaken off a hamstring injury to become one of the NRL's form players at a resurgent Newcastle outfit this season.
"It comes down to more than just Sam Walker," Young said.
"Their whole spine has been in great form. Kalyn's playing great, Cameron's playing great.
"We've got a big job in game three to shut them down."
While Queensland customarily claim the underdog tag, the Blues are undisputed outsiders for game three after leaking 36 second-half points in their 44-24 game-two loss.
That's fine by Young.
"We know what we're walking into. No one gives us a chance, no one believes in us," he said.
"Everyone's writing stuff about us. I enjoy that."
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