JMAN-
I respect a person who knows baseball like you do and has a passion for the sport.
Having said that, I agree with you you, Ricky was very very good at cutting balls off down the line and even with his terrible arm was able to keep many baserunners from advancing maybe better than anybody.
However, YAZ was probably equally as good as Ricky at this too through his positioning, quick jumps, more than adaquate speed, and excellent throwing arm.....and a given day, either one may have been better.
However, YAZ was SUPERIOR in EVERY other phase of his defensive play compared to Rickey.......very very seldom did Yaz misjudge a fly ball, throw to the wrong base, not get a good a great jump on the ball, and his ability to charge a groundball was unmatched as a leftfielder.
YAZ was a trully gifted leftfielder in every aspect.......and like you mentioned earlier, I didnt even mention the way he played the monstor to perfection back in the old days when it had all kinds of different bounces.
YAZ was a joy to watch play outfield and every kid in America should watch films of how he played defensively.