Agreed re. Fiers, he's done it before.
I'm having a hard time remembering any game prior to last nights'; what was so worrisome about McCullers' outing Sunday? Not a great game, but far from a disaster. I'm guessing you're referring to something about his demeanor...
Run 1 homer shit happens
Run 2 he drops easy toss at 1st, with two outs, gives up double to fucking pitcher, balks in run
Run 3 two outs, no one on single to great hitter, wild pitches him to second, run scores on two strike ground rule double. Without wild pitch, run does not score.
He is too amped up on random Tuesday games. Not his fault he is a rookie. Sunday the pressure got him, I think.