Wiktionary
mid-season form
alt. (context sports English) peak form, optimal form, excellent form. n. (context sports English) peak form, optimal form, excellent form.
Usage examples of "mid-season form".
Yet in this aspect now I could detect no indication whatsoever that he was about to round into mid-season form.
I don't myself, my personal liver being always more or less in mid-season form, but I've seen the advertisements.
What I mean to say is, if you've just finished exercising the old bean, it's probably in mid-season form for tackling problems.
I told her about the gnat in Madeline's eye, the part I had played in restoring her vision to mid-season form and the exception Spode had taken to my well-meant efforts.