EF 70-200 IS iii USM - partial blurred image

[kirtapp]

I purchased this lens used about a year ago and have been noticing that I have images that are blurred at the bottom when shooting horizontal. I first assumed it was my camera shutter as I have a 1DXii that had a fairly high shutter count; however, I just obtained another and I’m seeing the result. 
Anyone have any suggestions on what’s going on and if this is possibly an expensive fix? 

Here is a link to a photo for reference: https://www.dropbox.com/scl/fi/pq9cdar782nuz55ufmrrw/Photo-Feb-28-2026-10-01-07-PM.jpg?rlkey=c63mvi8...

[ebiggs1]

"I am curious if you looked at the RAW images I uploaded."

No, sorry I didn't notice you u/l some raw images with exif intact. I have now corrected that error. Now looking at the samples I still recommend you do the static test. Not knowing the actual distance from subject but DOF at f2.8 and 75mm isn't going to be forgiving. There is going to be a lot of the scene OOF. To be honest most of the sample are soft not just the edges, IMHO. You may very well have a decentered element especially if the lens has suffered a drop or impact, etc. Even small ones. No use guessing do the test to be sure and do it without a preconceived mind.

BTW, #33 black is committing a foul on white.