Cooper Flagg vs. Isaiah Hartenstein Season by Season Comparison
Side by side comparison of each NBA season of Isaiah Hartenstein and Cooper Flagg, from their rookie seasons to their last year played, in chronological order with awards, stats, championships and playoff performance of their teams every year.
Who had the better rookie season? Who had best stats in their 10th season? Who won a championship first? These questions and many others, are answered here.
Cooper Flagg played 1 year in the NBA, 7 less than Isaiah Hartenstein, who played 8. Cooper Flagg had his first NBA Season in 2025-26, while Isaiah Hartenstein had his rookie season in 2018-19. With that starting point, here you can take a look at each of their seasons side by side and compare how their careers evolved in achievements, awards and championships won, the stats they recorded both in the Regular Season and the Playoffs and how their teams performed in the postseason.
Their Careers | |||
| Player | Total Seasons | Playoffs Played | NBA Years |
| Cooper Flagg | 1 | 0 | 2025-26 |
| Isaiah Hartenstein | 8 | 4 | 2018-19 to 2025-26 |
Comparison Season by Season |
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Jump to season: | ||
Rookie Season |
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| Cooper Flagg | Isaiah Hartenstein | |
| Season | 2025-26 | 2018-19 |
| Team | Dallas Mavericks | Houston Rockets |
| Honors & Awards | ||
| Playoffs | Did Not Play | Rockets Lost West Conf Semis |
Rookie Season Stats Comparison | ||||||||||||||||||||
| Regular Season Stats | ||||||||||||||||||||
| G | Min | Pts | ORb | DRb | Reb | Ast | Stl | Blk | TO | PF | FGM / A | % | 3PM / A | % | FTM / A | % | ||||
| Cooper Flagg | 1 | 32.0 | 10.0 | 1.0 | 9.0 | 10.0 | 0.0 | 1.0 | 0.0 | 3.0 | 3.0 | 4.0 | 13.0 | .308 | 0.0 | 1.0 | .000 | 2.0 | 2.0 | 1.000 |
| difference: | +27 | +24.1 | +8.1 | +0.2 | +8.1 | +8.3 | +0.5 | +0.7 | +0.4 | -2.5 | -1.0 | +3.3 | +11.5 | +.180 | +0.1 | +0.8 | +.333 | +1.6 | +1.5 | +.214 |
| Isaiah Hartenstein | 28 | 7.9 | 1.9 | 0.8 | 0.9 | 1.7 | 0.5 | 0.3 | 0.4 | 0.5 | 2.0 | 0.7 | 1.5 | .488 | 0.1 | 0.2 | .333 | 0.4 | 0.5 | .786 |
| Playoffs Stats | ||||||||||||||||||||
| G | Min | Pts | ORb | DRb | Reb | Ast | Stl | Blk | TO | PF | FGM / A | % | 3PM / A | % | FTM / A | % | ||||
| Cooper Flagg | DNP | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Isaiah Hartenstein | 2 | 1.0 | 2.0 | 0.5 | 0.0 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.5 | 1.0 | 1.0 | 1.000 | 0.0 | 0.0 | - | 0.0 | 0.0 | - |
Additional Years |
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* Isaiah Hartenstein played 7 seasons more than Cooper Flagg in the NBA. In that period—his seasons 2 to 8, from 2020 to 2026—Isaiah Hartenstein played in 3 Playoffs and won one NBA Championship. |