Yahoo had an article that verified this:
"The drop in pitch speed could potentially be due to a new mechanical approach that Hence is taking on the bump.
I was kind of getting a little stiff on the mound (before the injury), so (I've) just been working on getting more athletic again," Hence told reporters on Thursday. The work seems to have blossomed into a new stance - and possibly a higher arm slot - on the mound, one in which the righty is more upright and less bent over while throwing pitches."
"It was a really good reset for me to really learn (about) myself as a pitcher," Hence said of the lengthy IL stint. "I think it's paying off."
https://sports.yahoo.com/article/cardin ... 22320.html
On the other hand - in his outing on June 7th -- he averaged 95 mph.
2.2 IP, H, 0 ER, 0 BB, 6 K
"Hence’s fastball was up 1.5 ticks from his previous rehab outings, averaging 95 MPH and registering 7 whiffs. He also mixed in a hard gyro-SL, a low-80s CB w/ minimal depth, and is still finding feel for his CH."
https://x.com/KareemSSN/status/1931493388265681027