He's more Mikal Bridges than he is Jalen Brown, except his can't shoot as well as Bridges.
If we go with the Mikal Bridges comp, here is why I would not equate J-Dub to Mikal Bridges:
(1) Mikal Bridges has limited ball-handling
(2) Mikal Bridges has limited passing / playmaking.
(3) Mikal Bridges has limited shot creation.
I put the limited ball-handling first because that is the key component that is missing for Mikal as an offensive creator (scorer or playmaker). That is why he cannot generate much offense for himself. Why he has to play off of others.
This is why Mikal Bridges cannot score big numbers when on a good team. It is because he cannot create well enough for himself. So he becomes a 14-17ppg scorer. A 3rd / 4th option. The only time he got near 20ppg was when he was on one of the league's worst teams and being force fed night after night.
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J-Dub is a very good ball-handler and passer. He is a functional secondary playmaker / point forward. Over his last 3 seasons, J-Dub is averaging 5apg against 1.9 turnovers. This while playing 2nd fiddle to SGA. I believe his numbers go up to 6-7apg when SGA does not play.
J-Dub's ball-handling also allows him to create his own offense. He is not a great scorer because he doesn't shoot the outside shot well and he doesn't get to the foul line. However, he is a driver, good paint finisher, good transition scorer, good midrange scorer. He is averaging 19.7ppg over last 3 years. I believe this goes up to 22-23ppg when SGA is out of the lineup.
So J-Dub has scored roughly 20ppg for 3 years on a team that is a title contender each season and won the title in 2025 as the 2nd option on the team.
J-Dub is also a high level defensive player. Both a high level one-on-one defender and a high level team defender.
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These are not two similar players.