The 27-year-old is on loan with the Blues from their Championship rivals Derby County, and he explained that the two sides currently have no deal in place that would allow Shotton to line up against his parent club. And while that is not a problem during the regular season, as the two sides have already faced each other twice this campaign, it may prove to be a cruel stumbling block if they both reach the play-off final.
"We will maybe approach the FA but I know at the moment I won’t be able to play," he told the Mail.
"We will have to speak to Derby, Derby probably wouldn't let me play. There is no clause in there to say I could play.
"It's crossed my mind many times and I would be very disappointed if I couldn't play - especially if it was the final of the play-offs."
With daylight starting to appear in places in the Championship table, the sides that are now establishing themselves as promotion contenders are starting to emerge, and Gary Rowett's men and the Rams are certainly two of those teams.
Currently, Derby occupy that final place in the top six, while Birmingham are their nearest challengers with just three points separating the two sides.
And while Shotton will be hoping that Derby may show a little compassion, should both teams reach the play-off final, the fact that the club have fallen agonisingly short of promotion in the past two seasons - capitulating on the final day last season and being denied in the play-off final the year before - will surely see the Rams take no risks that would potentially allow their own player to prevent them returning to the Premier League.