How is it unprecedented? People said he peaked too early arguing that when he came in he was older 21. By that logic, a lot of other star players have lied. Plenty of star players declined liked Pujols. Pujols declined from elite caliber after the 2012 season, but was still really good through 2016, his age 36 season.
Compare it to another generational player that got hit with injuries, and he's similar to Griffey. Bautista started his major decline earlier.
There is nothing crazy about his decline, even if injuries weren't a factor, which they were.
I think Griffey is an unfair comparison because injuries essentially derailed his career...
From age 31 - 34, Griffey averaged only 79 games per season, but his 162 game averages were...
33 HR, 89 RBI, .266 AVG, .360 OBP, .873 OPS
Bautista's 162 game averages from age 31 - 34...
41 HR, 112 RBI, .261 AVG, .377 OBP, .899 OPS
And Pujols' 162 game averages from age 31 - 34...
33 HR, 109 RBI, .280 AVG, .341 OBP, .835 OPS
You just don't see that drastic a drop off in production among all-time greats during that age range...