I'm sure many people have an opinion but when do people feel that fatigue begins to if at all, affect a hitters performance. I sit my best players when they go down to....

I have never let mine go down below 98%, so I don't know, but would like an opinion from the smart kids in the class

I believe performance decline is gradual, dropping a small amount for each 1% drop. Some people thought it happended in quantum leaps beginning at 93%. In the 90s fatigue is barely noticeable in the short term but probably does make a difference over the long haul. fatigue effects may have been increased in the recent update. note that fatigue also hurts fielding.

I try to keep my players at 100% for most of the season if I have enough bench to fill in. I'll play slightly fatigued players in key games.

If you can rest your players early in the season (first 50 games), it makes a big difference later on. I'll let my position players get down to 93%, in the second half, without noticing much decline in offensive production.

I rest my players early when playing teams from the opposite league, and I'll rest them down the stretch if I'm able to. But recently I was in a tight playoff race where I had to start some part-time stud hitters at 90-92% down the stretch. Small sample size (about 20 games) but they hit much worse than they did at 100%.

I set my auto rest at 80 for infielders and outfielders, and 90 for the catcher, but I draft regulars who played virtually every day RT, so their fatigue rarely gets that low. I draft bench players, except for my backup catcher, principally for pinch hitting and pinch running speed.

I know a couple of the guys who tried to go for the error-less seasons ended up having their only error happen with a player who went below 100% fatigue.

OTOH, I've been told that fatigue doesn't really affect players until it hits 94%.

I have 1954 Frank LaPorte in a dual season progressive league(1909/1954). In real life, he had 332 at bats with a .298 AVG. Through 132 games, he is up to 324 at bats and is at 90%. He has been below 95% for quite a bit of the season and as low as 89%, but as soon as he dropped below 90%, i rested him a few games. He has been hitting between .330 and .342 basically the entire time.

With that being said, i am in a tight race for the division and if i do in fact make the playoffs, we will see if he can keep it up.

I mostly run progressives. Given the limited player base, I have to pay attention to ip's and pa's much more than in themes.
I set my sp's at 90, my relievers at 85. I have noticed that some relievers get shelled below 90 while others are ok. No hard statistical data, but when you have the same p's for a few seasons in a row, things do stick out.

As for my fielders/hitters, 93 is my usual setting. I notice that fielding takes a dive before I notice a dip in hitting.

There used to be a graph floating around. Can't find it right now, but it was posted by the site at one time.

Can anybody confirm that they didn't make fatigue linear in the last update?

It's definitely not in the release notes, fwiw...