The Blues have spent much of the season in contention for the Championship's top six.
Clayton Donaldson has suggested that injuries to key members of the squad has been one of the main reasons that Birmingham have missed out on a play-off spot in the Championship, the Birmingham Mail reports.
Gary Rowett's men have spent most of the campaign around the top six, but a poor run at the end of the season has seen them fall 12 points adrift of the side that have secured that final play-off spot Sheffield Wednesday.
And Donaldson has suggested that the knocks that several members of the side have picked up this term has probably been the reason that the Blues are destined for another year in the second tier.
"We had a few injuries here and there which knocked us about a bit and I don’t think we coped with that as well as we would have liked," he told the Mail.
"That could have been the turning point where the season drifted away a little bit.
"But overall it's positive. We are showing good signs and I think we just have to take that forward."
With Rowett having one of the smaller squads in the division to pick from, as soon as one or two players are struck down by injury, it can have a considerable impact on the side's fortunes.
Both the 32-year-old and playmaker Jon Toral have been amongst those in the Blues' squad that have had to spend some time on the sidelines this season, and their absence has contributed to the team's form.
Donaldson spent just over a month on the injury table just before Christmas, and without him, the Midlands outfit managed just one win in six games.
But after a promising season, the Blues will go into next year confident that if they can get lucky regarding injuries, they have the ability to mount another play-off push.