Calvin Natt
1979–80 to 1989–90 · 11 seasons
NBA player comparison
Calvin Natt vs. Otis Birdsong: Career comparison
Regular-season verdict
Calvin Natt ranks higher in career impact
Otis Birdsong
1977–78 to 1988–89 · 12 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.
#349LeadsCareer Impact RankPeak-weighted regular-season rank#353
+4.0LeadsPeak box impactEra-adjusted points per 100 possessions above league average · higher is better+2.9
+2.3LeadsBest 5 average box impactEra-adjusted points per 100 possessions above league average · higher is better+2.0
25.3LeadsBest 3 average finishAverage league place · lower is better28.0
+1,440 ptsLeadsPoints above replacementCumulative regular-season value+1,261 pts
96.3Best 10 average finishAverage league place · lower is better85.9Leads
Career Impact Rank places Calvin Natt #349 and Otis Birdsong #353. It combines league finishes across each player's best three, five, and ten regular seasons, giving the most weight to the best three.
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 calculatedCalvin Natt42.427 · No. 349Otis Birdsong42.940 · No. 353
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.
Calvin Natt
42.427 composite · No. 349 all-time
| Window and finishes used | Average finish | Weight | Contribution |
|---|---|---|---|
| Best 3No. 151984–85Recorded box inputsIncludes bounded historical defense estimateNo. 301985–86Recorded box inputsIncludes bounded historical defense estimateNo. 311981–82Recorded box inputsIncludes bounded historical defense estimate | 25.333 | 50% | 12.667 |
| Best 5No. 151984–85Recorded box inputsIncludes bounded historical defense estimateNo. 301985–86Recorded box inputsIncludes bounded historical defense estimateNo. 311981–82Recorded box inputsIncludes bounded historical defense estimateNo. 451982–83Recorded box inputsIncludes bounded historical defense estimateNo. 541979–80Recorded box inputsIncludes bounded historical defense estimate | 35.000 | 30% | 10.500 |
| Best 10No. 151984–85Recorded box inputsIncludes bounded historical defense estimateNo. 301985–86Recorded box inputsIncludes bounded historical defense estimateNo. 311981–82Recorded box inputsIncludes bounded historical defense estimateNo. 451982–83Recorded box inputsIncludes bounded historical defense estimateNo. 541979–80Recorded box inputsIncludes bounded historical defense estimateNo. 601983–84Recorded box inputsIncludes bounded historical defense estimateNo. 1051987–88Recorded box inputsIncludes bounded historical defense estimateNo. 1161980–81Recorded box inputsIncludes bounded historical defense estimate2 open slots × No. 253.5 | 96.300 | 20% | 19.260 |
12.667 + 10.500 + 19.260= 42.427
Open-season rule: every unfilled slot uses No. 253.5, this player's stored replacement finish.
Otis Birdsong
42.940 composite · No. 353 all-time
| Window and finishes used | Average finish | Weight | Contribution |
|---|---|---|---|
| Best 3No. 181980–81Recorded box inputsIncludes bounded historical defense estimateNo. 301979–80Recorded box inputsIncludes bounded historical defense estimateNo. 361978–79Recorded box inputsIncludes bounded historical defense estimate | 28.000 | 50% | 14.000 |
| Best 5No. 181980–81Recorded box inputsIncludes bounded historical defense estimateNo. 301979–80Recorded box inputsIncludes bounded historical defense estimateNo. 361978–79Recorded box inputsIncludes bounded historical defense estimateNo. 431984–85Recorded box inputsIncludes bounded historical defense estimateNo. 691983–84Recorded box inputsIncludes bounded historical defense estimate | 39.200 | 30% | 11.760 |
| Best 10No. 181980–81Recorded box inputsIncludes bounded historical defense estimateNo. 301979–80Recorded box inputsIncludes bounded historical defense estimateNo. 361978–79Recorded box inputsIncludes bounded historical defense estimateNo. 431984–85Recorded box inputsIncludes bounded historical defense estimateNo. 691983–84Recorded box inputsIncludes bounded historical defense estimateNo. 711982–83Recorded box inputsIncludes bounded historical defense estimateNo. 851977–78Recorded box inputsIncludes bounded historical defense estimateNo. 1471981–82Recorded box inputsIncludes bounded historical defense estimateNo. 1501985–86Recorded box inputsIncludes bounded historical defense estimateNo. 2101987–88Recorded box inputsIncludes bounded historical defense estimate | 85.900 | 20% | 17.180 |
14.000 + 11.760 + 17.180= 42.940
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 | Calvin Natt | Otis Birdsong |
|---|---|---|
| Career Impact RankPeak-weighted regular-season rank | #349Better result for this metric. | #353 |
| Best 3 average finishAverage league place · lower is better | 25.3Better result for this metric. | 28.0 |
| Best 5 average finishAverage league place · lower is better | 35.0Better result for this metric. | 39.2 |
| Best 10 average finishAverage league place · lower is better | 96.3 | 85.9Better result for this metric. |
Show more stats: Impact
| Metric | Calvin Natt | Otis Birdsong |
|---|---|---|
| Points-above-replacement rankAll-time rank in estimated regular-season points above replacement | #304Better result for this metric. | #354 |
| Peak box impactEra-adjusted points per 100 possessions above league average · higher is better | +4.0Better result for this metric. | +2.9 |
| Best 3 average box impactEra-adjusted points per 100 possessions above league average · higher is better | +2.9Better result for this metric. | +2.4 |
| Best 5 average box impactEra-adjusted points per 100 possessions above league average · higher is better | +2.3Better result for this metric. | +2.0 |
| Best 10 average box impactEra-adjusted points per 100 possessions above league average · higher is better | Unavailable | +0.5 |
| Points above replacementRegular season · fixed -2.0 replacement baseline · higher is better | +1,440 ptsBetter result for this metric. | +1,261 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 | Calvin Natt | Otis Birdsong |
|---|---|---|
| Games | 599 | 696 |
| Minutes | 18,818 | 21,627 |
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 | Calvin Natt | Otis Birdsong |
|---|---|---|
| True shooting percentage | 57.9%Better result for this metric. | 53.3% |
| True shootingAverage across the best impact seasons selected for the model input profile | 57.7%Better result for this metric. | 52.6% |
Show more stats: Shooting
| Metric | Calvin Natt | Otis Birdsong |
|---|---|---|
| Field-goal percentage | 52.8%Better result for this metric. | 50.6% |
| Three-point percentage | 21.9% | 27.4%Better result for this metric. |
| Free-throw percentage | 76.8%Better result for this metric. | 65.5% |
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 | Calvin Natt | Otis Birdsong |
|---|---|---|
| Assist rateAverage across the best impact seasons selected for the model input profile | 10.1% | 16.5%Better result for this metric. |
| Assists per game | 2.2 | 3.2Better result for this metric. |
Show more stats: Passing
| Metric | Calvin Natt | Otis Birdsong |
|---|---|---|
| Turnover rateAverage across the best impact seasons selected for the model input profile | 12.3% | 11.4%Better result for this metric. |
Rebounding
Rebound rate is the share of available rebounds collected while on court.
| Metric | Calvin Natt | Otis Birdsong |
|---|---|---|
| Rebound rateAverage across the best impact seasons selected for the model input profile | 11.6%Better result for this metric. | 5.2% |
| Rebounds per game | 6.8Better result for this metric. | 3.0 |
Defense
Steals and blocks describe only part of defense. They do not capture every stop, rotation, or matchup.
| Metric | Calvin Natt | Otis Birdsong |
|---|---|---|
| Steal rateAverage across the best impact seasons selected for the model input profile | 1.3% | 1.8%Better result for this metric. |
Show more stats: Defense
| Metric | Calvin Natt | Otis Birdsong |
|---|---|---|
| Block rateAverage across the best impact seasons selected for the model input profile | 0.6%Better result for this metric. | 0.4% |
Scoring
Points per game describe scoring volume, not overall impact.
| Metric | Calvin Natt | Otis Birdsong |
|---|---|---|
| Points per game | 17.2 | 18.0Better 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
Calvin Natt ranks higher in career impact.
Calvin NattMetricOtis Birdsong
#349LeadsCareer Impact RankPeak-weighted regular-season rank#353
+4.0LeadsPeak box impactEra-adjusted points per 100 possessions above league average · higher is better+2.9
+2.3LeadsBest 5 average box impactEra-adjusted points per 100 possessions above league average · higher is better+2.0
+1,440 ptsLeadsPoints above replacementRegular season · fixed -2.0 replacement baseline · higher is better+1,261 pts
This is the ranking result. It uses regular-season impact only. Team records, playoffs, and awards do not change it.
Team Success
Calvin Natt leads every available measure below.
Calvin NattMetricOtis Birdsong
550LeadsListed-team regular-season wins470
51.6%LeadsListed-team winning percentage47.8%
2Leads50-win team seasons0
060-win team seasons0
10LeadsPlayoff team seasons9
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
Calvin Natt leads every available measure below.
Calvin NattMetricOtis Birdsong
7Playoff appearances7
45LeadsPlayoff games35
20LeadsTeam playoff wins14
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
Otis Birdsong leads every available measure below.
Calvin NattMetricOtis Birdsong
1All-Star4Leads
0MVP0
0All-NBA1Leads
0All-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.
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.
Calvin NattOtis BirdsongPeak seasonHistorical source qualification
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.
Calvin NattNBA seasonOtis Birdsong
Season 1
Season 2
Season 3
Season 4
Season 5
Season 6
Season 7
Season 8
Season 9
Season 10
Season 11
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.