No disrespect, but you're asking the wrong question. Too many variables. If you could literally put Babe Ruth in a time machine and have him play today, I don't know if he'd hit well or not. But at the time he played. Babe Ruth dominated baseball as much as any player in any era. 12 home run titles (including 6 in a row), 13 times leading his league in OPS, 13 times in slg. pct., the list goes on and on..... Ty Cobb won 12 batting titles. Also, I'm not so sure that athletes are really all that much bigger, stronger, etc. today that they were years ago. Take the 100 meter dash world record as an example (thus, we have an objective measure of performance- time). In 1936, Jesse Owens ran a 10.2 and in 2009, Bolt ran a 9.58. That's only about a 6% improvement. Don't know if other objectively measured (other races, swimming, weightlifting) show a greater improvement or not.