With Reynolds returning from a hamstring injury, Walsh was assigned goal-kicking duties for Sunday's NRL preliminary final against Penrith at a heaving Suncorp Stadium.
But a wobbly first attempt only narrowly scraped inside the woodwork, before the fullback missed a straightforward shot that could have put Brisbane within two points as they chased a comeback.
When Deine Mariner crossed in the final five minutes to level the scores, Walsh rescinded the kicking tee to the much more seasoned Reynolds.
"The skipper (Reynolds) was telling me all week that he's goal-kicking, so I didn't do one bloody rep," Walsh said on Fox League's broadcast.
From the right-hand touchline, Reynolds cooly sent the ball between the posts, showing no signs of the injury that had sidelined him since round 23.
The strike also sent the Broncos into the 2025 grand final, where they meet Melbourne next Sunday for the chance at a seventh premiership.
"Those moments are for him (Reynolds)," Walsh said.
"I'm his little apprentice. I look up to him.
"(There was) a lot of talk throughout the week with our old bloody skipper, and he stood up in that big moment. I'm just, I'm so bloody happy for him."
There had been plenty of speculation that livewire fullback Walsh would need to be the man to conquer the four-time premiership winners in the preliminary final.
Walsh had entered the clash in a purple patch of form, most notably rallying the Broncos from 16 points down in the qualifying final against Canberra.
It was largely on the back of forward Payne Haas that the Broncos charged back into the contest from 14-0 down.
But Walsh did throw the looping pass to Mariner that helped the winger cross the line, allowing Reynolds to step up for the ultimately decisive shot.
Walsh said he hoped to one day ice big games for the Broncos like 2014 premiership halfback Reynolds.
"Those bloody (clutch) moments, you know, they're for him," he said.
"My time will come, and I'm just so grateful to be able to play with a player like that."
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