As this story hit the news wire, Crosby's agent, Pat Brisson, quickly refuted these claims, saying that Crosby has adjusted his training, but it's too soon to speculate on whether or not he'll miss the start of the season.
The fact that Crosby has adjusted his training at the very least once again sparks discussion of Crosby's future.
This news of a setback comes amid Dave Scatchard's retirement from hockey due to the lingering effects of post-concussion syndrome.
It's easy to see why people are questioning his return, but let's take it a step further: what effect will this have on Crosby's career?
Let's take a look at all the factors.