Pablo Sandoval's weight issue

Pablo Sandoval's numbers were down in 2010. Was his weight to blame? Ezra Shaw/Getty Images

The San Francisco Giants sent Pablo Sandoval a clear message at the end of last season: Report to camp in better physical condition or risk being sent to the minor leagues. The organization wants to see Kung Fu Panda get back to being the player he was in 2009, when he was the team's best hitter and a charismatic fan favorite, and believes that a slimmed-down Sandoval is the best way to get his career back on track.

While getting in better physical condition certainly seems to be a good idea, history suggests that it is not the panacea that it may appear. In fact, the evidence actually suggests that for players the size of Sandoval, losing weight doesn't seem to affect their on-field performance one way or another.