Jonathan Isaac
2017–18 to 2025–26 · 7 seasons · active
NBA player comparison
Jonathan Isaac vs. Roy Tarpley: Career comparison
Regular-season verdict
Roy Tarpley ranks higher in career impact so far
Roy Tarpley
1986–87 to 1994–95 · 6 seasons
Impact comparison
Box impact estimates points per 100 possessions above each season's league average. Higher is better. Career ranks and average league finishes work the other way: lower is better.
#1152Career Impact Rank to datePeak-weighted regular-season rank#1004Leads
+3.2LeadsPeak box impactEra-adjusted points per 100 possessions above league average · higher is better+2.7
+1.3LeadsBest 5 average box impactEra-adjusted points per 100 possessions above league average · higher is better+0.4
66.3Best 3 average finishAverage league place · lower is better63.0Leads
+363 ptsLeadsPoints above replacementCumulative regular-season value+329 pts
226.8Best 10 average finishAverage league place · lower is better178.9Leads
Career Impact Rank places Roy Tarpley #1004 and Jonathan Isaac #1152. It combines league finishes across each player's best three, five, and ten regular seasons, giving the most weight to the best three. Jonathan Isaac had the higher single-season impact estimate and more total career value.
Regular season only. Impact figures are estimates; small gaps are not exact. Playoffs, awards and titles do not determine the verdict.
Career Impact RankSee exactly how both rankings are calculatedJonathan Isaac110.027 · No. 1,152Roy Tarpley95.120 · No. 1,004
Only the three league-finish windows below determine Career Impact Rank. Career Value and peak impact are separate measures; neither adds points to this calculation. Lower composite scores rank higher.
Jonathan Isaac
110.027 composite · No. 1,152 all-time
| Window and finishes used | Average finish | Weight | Contribution |
|---|---|---|---|
| Best 3No. 312019–20Recorded box inputsIncludes bounded historical defense estimateNo. 462023–24No. 1222018–19Recorded box inputsIncludes bounded historical defense estimate | 66.333 | 50% | 33.167 |
| Best 5No. 312019–20Recorded box inputsIncludes bounded historical defense estimateNo. 462023–24No. 1222018–19Recorded box inputsIncludes bounded historical defense estimateNo. 1232024–25No. 2032017–18Recorded box inputsIncludes bounded historical defense estimate | 105.000 | 30% | 31.500 |
| Best 10No. 312019–20Recorded box inputsIncludes bounded historical defense estimateNo. 462023–24No. 1222018–19Recorded box inputsIncludes bounded historical defense estimateNo. 1232024–25No. 2032017–18Recorded box inputsIncludes bounded historical defense estimateNo. 2592025–264 open slots × No. 371 | 226.800 | 20% | 45.360 |
33.167 + 31.500 + 45.360= 110.027
Open-season rule: every unfilled slot uses No. 371, this player's stored replacement finish.
Roy Tarpley
95.120 composite · No. 1,004 all-time
| Window and finishes used | Average finish | Weight | Contribution |
|---|---|---|---|
| Best 3No. 221988–89Recorded box inputsIncludes bounded historical defense estimateNo. 641987–88Recorded box inputsIncludes bounded historical defense estimateNo. 1031989–90Recorded box inputsIncludes bounded historical defense estimate | 63.000 | 50% | 31.500 |
| Best 5No. 221988–89Recorded box inputsIncludes bounded historical defense estimateNo. 641987–88Recorded box inputsIncludes bounded historical defense estimateNo. 1031989–90Recorded box inputsIncludes bounded historical defense estimateNo. 1071994–95Recorded box inputsIncludes bounded historical defense estimateNo. 1681986–87Recorded box inputsIncludes bounded historical defense estimate | 92.800 | 30% | 27.840 |
| Best 10No. 221988–89Recorded box inputsIncludes bounded historical defense estimateNo. 641987–88Recorded box inputsIncludes bounded historical defense estimateNo. 1031989–90Recorded box inputsIncludes bounded historical defense estimateNo. 1071994–95Recorded box inputsIncludes bounded historical defense estimateNo. 1681986–87Recorded box inputsIncludes bounded historical defense estimate5 open slots × No. 265 | 178.900 | 20% | 35.780 |
31.500 + 27.840 + 35.780= 95.120
Open-season rule: every unfilled slot uses No. 265, this player's stored replacement finish.
Averages, contributions, and totals are displayed to three decimal places. The ranking calculation keeps full source precision. Read the full method →
Full comparison · Career comparison
Understand the numbers
Start with impact, then compare playing time and skills. Team results add context. These are not categories to tally into a winner.
1 · Ranking evidence
Impact: who ranks higher, and why?
Career Impact Rank compares entire regular-season careers across NBA history. It combines average league places across the best three, five, and ten seasons, weighted 50%, 30%, and 20%. A lower rank or average place is better.
| Metric | Jonathan Isaac | Roy Tarpley |
|---|---|---|
| Career Impact Rank to datePeak-weighted regular-season rank | #1152 | #1004Better result for this metric. |
| Best 3 average finishAverage league place · lower is better | 66.3 | 63.0Better result for this metric. |
| Best 5 average finishAverage league place · lower is better | 105.0 | 92.8Better result for this metric. |
| Best 10 average finishAverage league place · lower is better | 226.8 | 178.9Better result for this metric. |
Show more stats: Impact
| Metric | Jonathan Isaac | Roy Tarpley |
|---|---|---|
| Points-above-replacement rankAll-time rank in estimated regular-season points above replacement | #926Better result for this metric. | #971 |
| Peak box impactEra-adjusted points per 100 possessions above league average · higher is better | +3.2Better result for this metric. | +2.7 |
| Best 3 average box impactEra-adjusted points per 100 possessions above league average · higher is better | +2.2Better result for this metric. | +1.3 |
| Best 5 average box impactEra-adjusted points per 100 possessions above league average · higher is better | +1.3Better result for this metric. | +0.4 |
| Best 10 average box impactEra-adjusted points per 100 possessions above league average · higher is better | Unavailable | Unavailable |
| Points above replacementRegular season · fixed -2.0 replacement baseline · higher is better | +363 ptsBetter result for this metric. | +329 pts |
| Seasons ranked No. 1 | 0 | 0 |
| Top-five impact seasons | 0 | 0 |
| Top-ten impact seasons | 0 | 0 |
2 · Playing time and responsibility
How much did each player take on?
Read games and minutes alongside impact. Offensive usage is the share of team plays a player ends with a shot, free throws, or a turnover while on court. More usage is not automatically better.
| Metric | Jonathan Isaac | Roy Tarpley |
|---|---|---|
| Games | 328 | 280 |
| Minutes | 6,161 | 7,476 |
3 · Individual skills
Where does each player have an advantage?
These are each player's averages across up to ten best seasons. Career Impact Rank gives the Best 3, Best 5, and Best 10 average league finishes 50%, 30%, and 20% window weights, giving the most weight to the highest peak. The model accounts for position, role, pace, playing time, and team results. Green marks the better result for a metric, including lower turnover rates. Workload and shot-selection measures stay neutral. These rows are not votes toward the ranking.
Shooting
True shooting includes two-pointers, three-pointers, and free throws.
| Metric | Jonathan Isaac | Roy Tarpley |
|---|---|---|
| True shooting percentage | 53.7%Better result for this metric. | 52.3% |
| True shootingAverage across the best impact seasons selected for the model input profile | 52.9%Better result for this metric. | 52.6% |
Show more stats: Shooting
| Metric | Jonathan Isaac | Roy Tarpley |
|---|---|---|
| Field-goal percentage | 44.1% | 48.3%Better result for this metric. |
| Three-point percentage | 31.6%Better result for this metric. | 17.6% |
| Free-throw percentage | 73.2% | 74.4%Better result for this metric. |
Passing
Assist rate is the share of teammates’ made shots assisted while the player is on court. Read turnovers alongside offensive workload; lower turnover rate is generally better.
| Metric | Jonathan Isaac | Roy Tarpley |
|---|---|---|
| Assist rateAverage across the best impact seasons selected for the model input profile | 5.6% | 5.8%Better result for this metric. |
| Assists per game | 0.7 | 1.0Better result for this metric. |
Show more stats: Passing
| Metric | Jonathan Isaac | Roy Tarpley |
|---|---|---|
| Turnover rateAverage across the best impact seasons selected for the model input profile | 10.7%Better result for this metric. | 14.2% |
Rebounding
Rebound rate is the share of available rebounds collected while on court.
| Metric | Jonathan Isaac | Roy Tarpley |
|---|---|---|
| Rebound rateAverage across the best impact seasons selected for the model input profile | 13.5% | 20.3%Better result for this metric. |
| Rebounds per game | 4.5 | 10.0Better result for this metric. |
Defense
Steals and blocks describe only part of defense. They do not capture every stop, rotation, or matchup.
| Metric | Jonathan Isaac | Roy Tarpley |
|---|---|---|
| Steal rateAverage across the best impact seasons selected for the model input profile | 2.3%Better result for this metric. | 2.1% |
Show more stats: Defense
| Metric | Jonathan Isaac | Roy Tarpley |
|---|---|---|
| Block rateAverage across the best impact seasons selected for the model input profile | 5.9%Better result for this metric. | 2.7% |
Scoring
Points per game describe scoring volume, not overall impact.
| Metric | Jonathan Isaac | Roy Tarpley |
|---|---|---|
| Points per game | 6.8 | 12.6Better result for this metric. |
4 · Team context, not ranking inputs
What happened with and without them?
A verified with/without comparison is unavailable for this scope. We do not substitute another season’s observations.
Four separate questions
Impact, winning, playoffs, and awards
These are different ways to understand a career. Only Regular Season Impact determines the hussEyquation verdict. The other three sections add basketball context without adding points or changing the rank.
Career to date. At least one player is active. Every total below stops after the latest completed season in this data; nothing is projected.
Regular Season Impact
Roy Tarpley ranks higher in career impact so far.
Jonathan IsaacMetricRoy Tarpley
#1152Career Impact Rank to datePeak-weighted regular-season rank#1004Leads
+3.2LeadsPeak box impactEra-adjusted points per 100 possessions above league average · higher is better+2.7
+1.3LeadsBest 5 average box impactEra-adjusted points per 100 possessions above league average · higher is better+0.4
+363 ptsLeadsPoints above replacementRegular season · fixed -2.0 replacement baseline · higher is better+329 pts
This is the ranking result. It uses regular-season impact only. Team records, playoffs, and awards do not change it.
Team Success
The advantages are split across the available measures.
Jonathan IsaacMetricRoy Tarpley
267LeadsListed-team regular-season wins257
47.3%Listed-team winning percentage52.2%Leads
050-win team seasons2Leads
060-win team seasons0
5LeadsPlayoff team seasons3
Context only. Not included in Career Impact Rank. Final records for every listed team-season. A traded season can include more than one team.
Playoff Résumé
Roy Tarpley leads every available measure below.
Jonathan IsaacMetricRoy Tarpley
3Playoff appearances3
17Playoff games24Leads
5Team playoff wins11Leads
0Finals appearances0
0Championships0
Context only. Not included in Career Impact Rank. Team playoff results count only seasons when the player appeared in a playoff game.
Awards
No recorded measure separates these careers.
Jonathan IsaacMetricRoy Tarpley
Not availableAll-Star0
Not availableMVP0
Not availableAll-NBA0
Not availableAll-Defense0
Not availableDPOY0
Not availableRookie of the Year0
Context only. Not included in Career Impact Rank. Major regular-season honors are recognition, not inputs to the impact ranking.
How each context field is counted
- Listed-team regular-season wins
- The sum of each listed team's final wins in every season the player represented that team.
- Listed-team winning percentage
- Those team wins divided by those teams' total regular-season games.
- 50- and 60-win team seasons
- Listed team-seasons that finished with at least 50 or 60 wins. Shortened seasons are not projected to 82 games.
- Team seasons reaching playoffs
- Listed team-seasons in which that team qualified for the playoffs.
- Playoff appearances and games
- Postseasons and games in which the player appeared.
- Team playoff wins
- Team wins from those postseasons. They describe team results, not individual credit.
- Finals appearances and championships
- Seasons when the player appeared in the playoffs for the finalist or champion.
- Awards
- Recorded NBA selections and major regular-season honors. A zero means the source records none; Not available means the source field is missing.
Source and scope Basketball Reference, NBA seasons 1950–51 through 2025–26, accessed 2026-10-09. Active-career totals are results to date through the latest completed season in the source.
Career Shape Explorer
How the careers developed
Follow every regular season by NBA experience or age. This view describes the path; it does not create another verdict.
Jonathan IsaacRoy TarpleyPeak seasonHistorical source qualification
Career to date. Active careers stop at the latest completed season; no future seasons are projected.
Estimated points per 100 possessions above that season's league average
Striped bars mark seasons with fewer than 40 games. A dashed mark means that player had no season at the aligned point.
Season-by-season evidenceRead both careers at the same stage
Every observed season keeps its age, era-centered impact estimate, league rank when qualified, career-stage label, and exact evidence link. A missing career point stays missing.
Jonathan IsaacNBA seasonRoy Tarpley
Season 1
Season 2
Season 3
Season 4
Season 5
Season 6
Season 7
No season
Observed values come from the accepted season comparison record. Historical source qualifications stay attached to affected seasons. Missing means no NBA season exists at that aligned point; it is never interpolated. Missing is not the same as estimated.