Here's are Kohli & Smith's aging curves overlaid.

Both are now at or below the replacement level, which is an average Test batter who is ~28yrs of age.

...in Ponting & Jayawardene

& outside the club in Kohli (I think
@jarrodkimber.bsky.social
pointed this out recently)

But the extent of Kohli's decline is unparalleled in the 10K club.

Steve Smith's career from an aging curve perspective.

He's had a more rapid decline than the average 10K club batter.

But he has company in the 10K club...

1999 - Tendulkar 's first test double hundred

Update Thread: I have decided to take a break from my role with Zelus Analytics supporting @rajasthanroyals.bsky.social. I'll continue to work independently to understand the game better, publish my work and be on the lookout for opportunities to work w/ leadership at teams & in the media.

The visual here reminded me of a piece I did several years ago where I used a graph representation to assess "momentum"
Something like this can be done for Tests, but we'd probably want to look at a longer period than 1yr.
tinyurl.com/4emjctuk