Injuries in professional sports happen often, but it's the scary ones that can make the average fan feel queasy. Seeing nasty falls, collisions or gravity-defying injuries easily puts sports in perspective. While the athletes we watch can perform superhuman acts, they are still human after all. An athlete can perform the spectacular today, and never the same tomorrow.

The Boston Celtics have seen their more-than-equal fair share of devastating injuries (Gordon Hayward was enough.) And while Kemba Walker's scary neck injury against the Denver Nuggets Friday night wasn't the same as Haywards', the fact a key member of the Celtics was stretchered off may have brought back similar vibes.

Hence, why the Celtics are already taking precautionary measures in bringing Walker back from his diagnosed sprained neck. Walker is listed as doubtful for the Celtics Monday matchup against the Sacramento Kings. Celtics head coach Brad Stevens recently admitted that they will operate from a measure safety with Walker until he's healthy. While Walker is feeling good, from Stevens's perspective, it's best to be safe than sorry.

The Celtics are currently 11-4 and enjoying a hot start to their season. But they are losers of three of their last four and must find a way to preserve their great start until Walker returns. But in good news, the Celtics with Walker are back to playing basketball the way Stevens envisions. The Celtics struggled with messing Kyrie Irving's freelance play with Stevens' brand of team-centric basketball. Walker has displayed so far he's no Irving and is all-in with Stevens style of basketball. But now, his head coach just wants him healthy for the long run.