Interesting that the headline refers to McNary as M’Nary. I am guessing that the Times press room did not have the right size small “c” and that “M’NARY” seemed better than “MCNARY.”
You could be right. I have seen that contraction form before in 70-year-old issues. Even for a byline. Roscoe McGowen (who is covering the All-Star game later this week) Has written under the tag "Roscoe M'Gowen" in days past. But not this season.