The Single vs. Multi-Sport Athlete

The debate for athletes, for some time now, has been whether you should focus on playing one sport  or multiple sports.  What would your reasoning be for only playing one sport?  Today, Adam Kessler, a speed trainer, takes a look at this topic.  Is there a right or wrong answer to this question?  To see where this Columbus, Ohio trainer weighs in, click here:  The Single vs. Multi-Sport Athlete