McCalvy's Keuchel article gives me hope that we shouldn't put too much stock in that outing.
https://www.mlb.com/brewers/news/dallas-keuchel-s-whirlwind-journey-to-brewers
“That first inning the other day, I was all amped up. Did well, but it was an out-of-body experience, even with all of the experience I have. Inning two, I thought I was going to settle in, but I let it get away a little bit. Luckily, I was able to corral it.
“Inning three, I was wiped. But I can’t tell ‘Murph’ [Brewers manager Pat Murphy] that I’m wiped in the third inning. So, it didn’t go how I wanted it to go in the fourth, but now I have my feet under me. I’ll be able to focus on what I like to do.