Jack Sikma
1980–81
NBA player comparison
Jack Sikma vs. Robert Parish: 1980–81 season
Regular-season verdict
Robert Parish leads in impact for 1980–81
Robert Parish ranks ahead of Jack Sikma in estimated impact while playing. This compares regular-season performance, not total contribution across the season.
Robert Parish
1980–81
Impact comparison
+2.0Season impactEstimated points per 100 possessions above that season's league average+4.8Leads
#36Season impact rank#6Leads
82Games82
2,920Minutes2,298
18.7PPG18.9Leads
51.2%TS%57.9%Leads
Robert Parish's estimated impact per 100 possessions was +4.8, compared with +2.0 for Jack Sikma. This compares their impact while playing, not their total contribution across the season. Both players are compared in the 1980–81 season using its published Impact Rate. A ranked comparison requires at least 450 minutes for each player.
Jack Sikma: 82 games and 2,920 minutes. Robert Parish: 82 games and 2,298 minutes. Playing time matters when judging the whole season; the impact estimate above is a rate, not a season total.
Read turnover rate alongside offensive workload. Offensive usage measures the share of team plays a player ends with a shot, free throws, or a turnover while on the court—not every touch, pass, or act of playmaking. These rows provide context; they are not extra points added to the ranking.
Regular season only. Impact figures are estimates; small gaps are not exact. Playoffs, awards and titles do not determine the verdict.
Behind the estimate
Why the model rates them this way
A verified breakdown of this season’s published estimate is unavailable. We do not substitute another season’s calculation.
What this does not establish: these figures do not prove that either player made his teammates shoot better. A verified teammate-shooting comparison is unavailable for this selected season. A small difference in the estimates is not a decisive basketball distinction.
Full comparison · 1980–81 season
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?
The impact estimate compares performance while playing, not total contribution over the season. The individual-stat estimate plus the lineup adjustment gives the final estimate.
| Metric | Jack Sikma | Robert Parish |
|---|---|---|
| Season impactEstimated points per 100 possessions above that season's league average | +2.0 | +4.8Better result for this metric. |
| Season impact rank | #36 | #6Better result for this metric. |
Jack Sikma: verified lineup window unavailable. Robert Parish: verified lineup window unavailable. The adjustment is not necessarily based on this season alone.
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 | Jack Sikma | Robert Parish |
|---|---|---|
| Games | 82 | 82 |
| Minutes | 2,920 | 2,298 |
3 · Individual skills
Where does each player have an advantage?
These figures describe the selected regular seasons. They provide context, not extra points added to the verdict. 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 | Jack Sikma | Robert Parish |
|---|---|---|
| True shooting percentage | 51.2% | 57.9%Better result for this metric. |
Show more stats: Shooting
| Metric | Jack Sikma | Robert Parish |
|---|---|---|
| Field-goal percentage | 45.4% | 54.5%Better result for this metric. |
| Three-point percentage | 0.0% | 0.0% |
| Free-throw percentage | 82.3%Better result for this metric. | 71.0% |
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 | Jack Sikma | Robert Parish |
|---|---|---|
| Assists per game | 3.0Better result for this metric. | 1.8 |
Rebounding
Rebound rate is the share of available rebounds collected while on court.
| Metric | Jack Sikma | Robert Parish |
|---|---|---|
| Rebounds per game | 10.4Better result for this metric. | 9.5 |
Scoring
Points per game describe scoring volume, not overall impact.
| Metric | Jack Sikma | Robert Parish |
|---|---|---|
| Points per game | 18.7 | 18.9Better 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.
Regular Season Impact
Robert Parish leads in impact for 1980–81.
Jack SikmaMetricRobert Parish
+2.0Season impactEstimated points per 100 possessions above that season's league average+4.8Leads
#36Season impact rank#6Leads
This is the ranking result. It uses regular-season impact only. Team records, playoffs, and awards do not change it.
Team Success
Robert Parish leads every available measure below.
Jack SikmaMetricRobert Parish
626Listed-team regular-season wins1,081Leads
54.5%Listed-team winning percentage62.8%Leads
450-win team seasons13Leads
060-win team seasons6Leads
11Playoff team seasons16Leads
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
Robert Parish leads every available measure below.
Jack SikmaMetricRobert Parish
11Playoff appearances16Leads
102Playoff games184Leads
49Team playoff wins121Leads
2Finals appearances6Leads
1Championships4Leads
Context only. Not included in Career Impact Rank. Team playoff results count only seasons when the player appeared in a playoff game.
Awards
The advantages are split across the available measures.
Jack SikmaMetricRobert Parish
7All-Star9Leads
0MVP0
0All-NBA2Leads
1LeadsAll-Defense0
0DPOY0
0Rookie 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.
Selected seasons
Era-centered impact
Both bars show the same NBA season. Missing or unqualified data does not establish a winner.
Jack SikmaRobert Parish
Estimated points per 100 possessions above that season's league average