Agreed, in the OP Ted stated that no one on Twins Daily has ever proved, or come up with evidence that center fielders were more prone to injury. If fact evidence was presented that knee injuries in general were much less common in baseball than other sports.
As Terry stated an expat Californian living in Texas came upon some ice while walking into his residence, presumably in flip flops, and tore up his knee.
In every sport players not only need to learn how to play, they have to learn to protect themselves. Some are better at that than others.