Early NBA competition
A season-long professional dunk competition followed the ABA–NBA merger.
Before DunkStat™ · The rules history
Illegal Dunks
Before the movement to count, verify, and preserve the dunk, basketball spent years deciding whether the play should be allowed at all.
The essential point“Illegal dunk” is not one universal modern rulebook term. Its meaning depends on the era, governing rules, event conditions, or slang context.
1967–1976
When the dunk itself was against the rules.
From the 1967–68 season through 1975–76, the national rules governing college and high-school basketball prohibited the dunk. The shot returned for the 1976–77 season.
The ban is often nicknamed the “Lew Alcindor rule” because it followed Lew Alcindor’s dominant first varsity season at UCLA. He later became Kareem Abdul-Jabbar. The historical record supports the dates of the ban; explanations for why it was adopted remain debated.
1967Dunk prohibited
1976Rule reversed
1976–77Dunk returns
From prohibited to optional
The dunk returned—but its showcase still disappeared.
Statistics preserve history.™
Basketball once prohibited the dunk entirely. Even after the dunk returned, its premier professional showcase was interrupted more than once—demonstrating the difference between temporary entertainment and a permanent statistical record.
First interruption
No NBA dunk contest was held until the modern All-Star Weekend event began in 1984.
Contest replaced
The slam-dunk contest was removed and replaced by the WNBA–NBA 2Ball shooting competition.
Weekend canceled
The entire All-Star Weekend—and therefore the dunk contest—was canceled during the league’s labor dispute.
The dunk returns again
The contest returned, but the dunk still remained entertainment rather than its own permanent official game statistic.
DUNKSTAT™ POSITION
A contest celebrates a moment. A statistic preserves the achievement.
DunkStat™ seeks to establish the slam dunk as an official, countable, and universally recorded statistic throughout every level of basketball—whether or not a dunk contest is being held.
Historical distinction: The 1998 removal was specific to the dunk contest. The 1999 absence resulted from cancellation of the entire All-Star Weekend, not a separate decision against the dunk.
A four-part definition
What people mean by “illegal dunk.”
A prohibited shot
During the 1967–1976 college and high-school rules era, dunking itself was prohibited. A dunk in covered competition was disallowed under the rules then in force.
A technical or violation
A dunk may be penalized when it occurs at a prohibited time—such as with a dead ball or under a governing association’s warmup and conduct rules.
An invalid event attempt
A contest or record attempt may be ruled invalid when it misses stated requirements for takeoff, measurement, contact, assistance, timing, or equipment.
Modern basketball slang
Players and fans often say a dunk was ‘illegal’ because it was unusually powerful, creative, disrespectful, or dangerous. That expression is emphasis, not an official ruling.
Are illegal dunks still a thing?
Yes—but normally only when a specific rule is broken. Modern organized basketball generally permits dunking during live play. A penalty can still arise from timing, dead-ball conduct, equipment abuse, excessive hanging, unsporting conduct, or another rule adopted by the governing association.
Founder archive · Documented 1989
Tim “Kick the Backboard” Stanfill and the Capital Centre
Multiple surviving newspaper clippings document that Stanfill participated in an amateur slam-dunk competition at the Capital Centre during halftime of a Washington Bullets–Boston Celtics game.
The Washington Post reported that UDC suspended Stanfill while the school and NCAA reviewed whether his participation and the announced prize affected his eligibility. A February 7, 1989 follow-up, “NCAA Clears Stanfil,” reported that the NCAA found him not in violation and restored his eligibility. A Washington Times report independently documented the reinstatement.
Most importantly for this page, a contemporary sports-page teaser used the printed headline “ILLEGAL DUNKS?” above Stanfill’s photograph. It asked whether he violated rules by competing; it did not rule that a particular dunk attempt was technically invalid. The archive therefore documents “illegal dunks” as the newspaper’s own question framing of the eligibility controversy.
Archival contextThe Washington Post reported Stanfill as UDC’s leading scorer at 26.3 points and 7.8 rebounds per game during the review. The later May 1989 retrospective reported 24.5 points and 8.5 rebounds per game.
Newly recovered primary evidence
“ILLEGAL DUNKS?” — the contemporary record
January–February 1989Capital Centre · Washington, DC
These clippings establish the full sequence: public “Illegal Dunks?” framing, UDC suspension, NCAA review, clearance, and reinstatement. Select any clipping to read the full-size archival image.
Capital CentreHalftime amateur slam-dunk contest
SuspendedUDC held Stanfill out during review
ClearedNCAA found him not in violation
ReinstatedEligibility restored to return to UDC
Name note: The 1989 clippings print the surname as “Stanfil.” DunkStat™ uses “Tim Stanfill” elsewhere to follow the founder’s current official spelling.
Primary archival evidence
“UDC Dunks Stanfill”
May 1989By Gwendolyn Redding
January 1989Capital Centre slam-dunk competition
2 days laterEligibility reportedly restored
24.5 PPGReported scoring average
8.5 RPGReported rebounding average
Transcription note: The page is reproduced as a historical document. The summary above follows the visible text while distinguishing the article’s documented facts from later campaign terminology.
Sources and editorial standard
History should be preserved with labels.
1989 “Illegal Dunks?” clippingContemporary sports-page teaser using the exact “ILLEGAL DUNKS?” headline ↗The Washington Post“Dunking Stanfil Is Suspended,” by Donald Huff ↗The Washington Post“NCAA Clears Stanfil,” February 7, 1989, by Donald Huff ↗The Washington Times“UDC’s Stanfil Reinstated by NCAA” ↗May 1989 clipping“UDC Dunks Stanfill” and “Basketball Controversy,” by Gwendolyn Redding ↗NBA historical recordOfficial year-by-year All-Star Slam Dunk Contest winners ↗The Washington Post1999 All-Star Game cancellation during the labor dispute ↗The GuardianHistory of the 1967–1976 high-school and college dunk ban ↗
Editorial note: Rules history, institutional sources, founder testimony, campaign artwork, and modern slang are different kinds of evidence. This page labels each one so readers can distinguish verified history from interpretation and developing archival claims.
The dunk was once prohibited. Now help make it count.