Luis Tiant, 83.
I loved watching that guy pitch when I was a kid.
The two opposing pitchers I always enjoyed watching were Tiant and Wilbur Wood (began when he started both ends of a DH). Tiant was the opposing pitcher in the first MLB game I ever attended. Something happened that night that will probably never happen again. Both starting pitchers (Tiant vs Palmer) pitched complete games - 10 inning CGs. Unfortunately, the Sox won on a Yaz homer in the top of the 10th.