are there any examples of rookies who showed all-star potential and the kind of jumps they made in their 2nd seasons?
Sure, there's as many examples as you want there to be:
Baseline:
Tatum Per-36 @ 19: 16.4ppg, 5.9rpg, 1.9apg, 58.6% TS, 15.3 PER
The great:
LeBron Per-36 @ 19: 19.1ppg, 5.0rpg, 5.4apg, 48.8% TS, 18.3 PER
LeBron Per-36 @ 20: 23.1ppg, 6.2rpg, 6.1apg, 55.4% TS, 25.7 PER
Durant Per-36 @ 19: 21.1ppg, 4.5rpg, 2.5apg, 51.9% TS, 15.8 PER
Durant Per-36 @ 20: 23.3ppg, 6.0rpg, 2.6apg, 57.7% TS, 20.8 PER
The very good:
Carmelo Per-36 @ 19: 20.7ppg, 6.0rpg, 2.7apg, 50.9% TS, 17.6 PER
Carmelo Per-36 @ 20: 21.5ppg, 5.9rpg, 2.7apg, 52.6% TS, 16.7 PER
Carmelo Per-36 @ 21: 26.0ppg, 4.8rpg, 2.6apg, 56.3% TS, 22.0 PER
*took Carmelo that 3rd year to really step up from his rookie year performance level
The still not there yet:
Wiggins Per-36 @ 19: 16.8ppg, 4.5rpg, 2.1apg, 51.7% TS, 13.9 PER
Wiggins Per-36 @ 20: 21.2ppg, 3.7rpg, 2.1apg, 54.3% TS, 16.5 PER
They looked promising at the time:
Deng Per-36 @ 19: 15.4ppg, 7.0rpg, 2.9 apg, 49.6% TS, 14.2 PER
Deng Per-36 @ 20: 15.4ppg, 7.1apg, 2.0apg, 51.7% TS, 15.8 PER
Beasley Per-36 @ 20: 20.1ppg, 7.9rpg, 1.5apg, 52.8% TS, 17.2 PER
Beasley Per-36 @ 21: 17.9ppg, 7.7rpg, 1.5apg, 50.5% TS, 16.1 PER
Tyreke Per-36 @ 20: 19.5ppg, 5.1rpg, 5.6apg, 52.9% TS, 18.2 PER
Tyreke Per-36 @ 20: 17.3ppg, 4.7rpg, 5.5apg, 48.2% TS, 14.4 PER
And Beasley, Deng, Carmelo were actually on playoff teams that first year.
Usually, I would think an optimistic bump would be a 4-5% increase in TS%, as the player becomes more confident in there game, learns better shot selection, how to get to the line, etc, but Tatum already has a ridiculous 58.6% TS! If he can lift that by a couple of points, that would be amazing.
Hopefully an increase in FTA.
Would love to see an uptick in assists.
It will definitely be interesting to see how it all blends together with Hayward and Irving and a better Brown.