Tanana was a flame thrower at one time but really did become the crafty lefty .
There was a good question years ago, back in the late 70's , when Guidry, Tanana and Mike Flanagan were all on op of baseball, the writer asked which of these three would still be a good pitcher if they lost their good fastball, and all the experts agreed that Tanana and Guidry had no chance without the heat...Tanana really did have a whole nother career as a crafty pitcher.
Tanana and Ryan back to back were muder on opponents in the mid 70's.