Spieth was a serious doubt for the year's second major after withdrawing from the AT&T Byron Nelson due to "severe pain" in his left wrist, an injury suffered when playing at home with his son Sammy.
The former world number one received intensive treatment on what he described as a "moderate grade tendon sheath tear" and was able to complete all four rounds at Oak Hill, shooting 73, 72, 71 and 69 to finish in a tie for 29th.
And the 29-year-old is keen to continue that upward scoring trend at this week's Charles Schwab Challenge at Colonial, a tournament he won in 2016 and in which he has finished runner-up three times.
Asked in his pre-tournament press conference about playing events immediately after a major, Spieth said: "I think the biggest challenge is that you just put so much effort to try and peak for four weeks, you don't want the let down of taking it too easy the next week.
"But the biggest benefit is I feel typically after a major, you feel as sharp as you can feel. This case specifically, going in and feeling like I got better each round last week makes me pretty confident about continuing that trend this week.
"I would have loved for the PGA to be this week and Colonial the next week just so I had that extra time to feel this way about last week. But it's in the past.
"(I'm) coming to a place where I can hopefully press on the gas pedal and kind of get back to where I felt like I was three or four weeks ago, which was on a really, really nice trend upwards as we head into a couple more majors."
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