The San Jose Sharks found themselves shorthanded on the back end Wednesday night thanks to some confusion involving the lineup card.

The Sharks were forced to play with only five defensemen against the Calgary Flames because of a last-minute switch that wasn't reflected on the official game sheet.

Paul Martin was originally listed as an active player, while Mirco Mueller was a scratch. However, Martin was ruled out shortly before the game, so Mueller was inserted in - but the club apparently didn't report the change in time.

Mueller was then deemed ineligible and removed from the game after officials noticed the discrepancy about six-and-a-half minutes into the first period.

Considering Brent Burns often plays more like a forward, the mix-up left the Sharks with just four true blue-liners against their Pacific Division rivals.

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