Final answer:
Yogi Berra, not Babe Ruth, is the baseball great known for saying "It ain't over till it's over" and other 'Yogisms'. Ruth, while legendary for his playing ability and persona, is not known for this particular phrase.
Step-by-step explanation:
The baseball great known for the saying "It ain't over till it's over" is not Babe Ruth, but rather Yogi Berra, another famed New York Yankees player. Berra, known for his paradoxical and amusing sayings, often called 'Yogisms', was an iconic baseball figure much like Babe Ruth. While the information provided discusses legends such as Babe Ruth, the colorful figure known for sayings like the one mentioned is Yogi Berra. Ruth, an iconic slugger of the 1920s, left an indelible mark on baseball history, but it is Berra who is remembered for his unique expressions.