Sidebottom booted 10 goals and picked up 32 possessions in the Murray Bushrangers' big win over the Dandenong Stingrays and Sheehan expected the 17-year-old's stocks to rise on the back of the dream game.
"That grand final performance can propel him," Sheehan said at the NAB AFL Draft Camp in Canberra on Wednesday.
"Others will make the call as to how far, but I know that prior to that game when I was asked to give my top 10, I nearly had him in there.
"I ended up going for a taller guy, but in my mind I had him around the top 10 mark anyway, so surely that sensational performance would rocket him right into contention amongst the best midfielders."
Sidebottom, nicknamed 'Rusty', started the 2008 season playing in the Bushrangers' back line before the coaching staff opted to utilise his exquisite skills on both feet further up the ground.
The AIS-AFL graduate said he was still pinching himself after last week's well-timed performance.
"I don't know where that game came from, but I wouldn't mind doing it every week," Sidebottom said with a laugh.
"I kicked 10 goals a couple of times back in U14s, but nothing like last week."
But Sidebottom's superb game was far from a one-off.
The devoted Essendon supporter completed the U16/U18 All-Australian double this year after an impressive championships display with Vic Country.
Sidebottom is already starting to develop a cult following as a result of his 10-goal haul and rock star-like name, but he said he was simply overawed by all the attention.
"I've never been in front of this many cameras and, as you can see, I'm shaking a bit now, but it's awesome," he said at a press conference on Wednesday.
"It's good that the draft camp is finally here, but it definitely has been a dream to get here.
"No one knows [how the recruiters are thinking]. Everyone is here trying to do the same thing and to get the same result, so wherever I go, it will be awesome."
