Sydney Sixers' hopes of a three-peat would almost certainly be dashed if not for Kerr, who finished 98 not out in Wednesday night's drama-laden victory over Adelaide at the SCG.
Kerr, accustomed to batting at No.8 for the Sixers, had previously tallied 77 runs at 11 from 11 BBL innings.
The allrounder, named in the league's team of the tournament on account of his bowling, usually bats at No.8 but was promoted to open for the depleted Sixers.
The BBL has some well-documented issues but Kerr, who was poised to switch focus to physiotherapy and grade cricket if this summer didn't work out, is an example of its potency as a platform.
The 25-year-old, who rejected interest from BBL rivals to sign a contract extension on the eve of Friday's final, could yet be a bargain selection at what is tipped to be a record-breaking IPL auction because of the addition of two new franchises.
"I just put myself in for the absolute minimum amount," Kerr told AAP.
"Hopefully there's an opportunity there if someone needs a back-up bowler, allrounder or something like that.
"You never know if there's a few injuries, hopefully the innings last night has helped cement my spot as an allrounder.
"Definitely not expecting a whole lot on that front."
Kerr's head is still spinning after carrying his bat to help Sydney haul in a target of 168.
"I'm not really a very active Twitter person or anything but I do have an account and saw Marnus Labuschagne reached out, made some comments on my innings. Gilly (Adam Gilchrist) as well," he said.
"That's pretty cool.
"It (the innings) just plants the seed of belief that I do belong here.
"I've always struggled with that.
"Because I probably averaged seven or eight, I'd hate to see the Fox Cricket statistics when I walk out to bat.
"I don't think the impact of what it might have - for the future - has really sunk in."
Kerr, who clattered a pressure-laden six off Wednesday night's third last ball, was thrilled to recommit to the Sixers before the BBL's contract embargo period started.
"It's nice to have a bit of security going into the next few years and I'm happy to stay at home too," he said.
"There were a few clubs showing interest, it was good to hear what they said.
"I went with my gut and stuck with the Sixers."
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