Steals, Blocks, and the Structural Gaps in NBA History

Published 8 September 2026Features

Every player whose career closed prior to that season has a blank space where defensive tallies now sit. That absence does not reflect an inability to disrupt an offense. It reflects an administrative boundary line.

``` +-------------------------------------------------------------------+ | NBA STATISTICAL TRACKING TIMELINE | +-------------------------------------------------------------------+ | 1970-71: Games started | | 1973-74: Steals, blocks, offensive rebounds, defensive rebounds | | 1977-78: Turnovers | | 1979-80: Three-point field goals | | 1982-83: Defensive Player of the Year award introduced | +-------------------------------------------------------------------+ ```

The statistical cutoff

The league’s official stats documentation establishes an explicit timeline for category additions. Games started were officially logged beginning in the 1970-71 season. Three years later, for 1973-74, the league introduced official tracking for steals, blocks, offensive rebounds, and defensive rebounds.

Other fundamental categories took longer. Turnovers appeared on official box scores beginning in the 1977-78 season. The three-point field goal followed two years after that, entering the official ledger for the 1979-80 season.

This sequence created rolling historical distortions. Total rebounds exist across league history, but split totals between offensive and defensive boards do not exist before the 1973-74 campaign. If a player snatched away an entry pass or turned back a shot in 1971, the event vanished into the final score. The box score simply lacked a column to store the action.

What the database can and cannot prove

All-time leaderboards in steals and blocks operate under a mechanical bias. They rank modern output against a past that was never counted.

A guard who played twelve seasons beginning in 1960 generated twelve seasons of defensive possessions, deflections, and takeaways. His total recorded steals in the database will forever remain zero. A center who anchored a paint from 1957 through 1971 generated thousands of interior stops. The league’s database lists his career block total as nonexistent.

Turnovers complicate historical assessments even further. Because the league only began tracking turnovers in the 1977-78 season, an entire generation of point guards and high-usage scorers has no recorded assist-to-turnover ratio. Analysts cannot weigh possessions lost against possessions gained for any player who finished a career before the late 1970s.

The tables do not show that earlier eras played without disruption. The tables show only what the official scorekeepers were instructed to write down.

The awards-era record

Individual hardware offers no substitute for early statistical absences. The NBA Defensive Player of the Year award was first introduced for the 1982-83 season. That introduction arrived nine years after steals and blocks entered the box score, and nearly four decades after the league was formed.

The voting history of the award reflects how formal defensive recognition shifted across subsequent decades:

• On August 25, 2020, the league announced Giannis Antetokounmpo as the 2019-20 Defensive Player of the Year.
• On April 18, 2022, the league announced Marcus Smart as the 2021-22 winner, identifying him as the first guard to secure the honor since Gary Payton in the 1995-96 season.
• On April 24, 2025, the league announced Evan Mobley as the 2024-25 winner.
• On April 20, 2026, the league announced Victor Wembanyama as the 2025-26 winner, noting he received all 100 first-place votes.

The gap between Payton in 1995-96 and Smart in 2021-22 underscores how voting outcomes gravitated toward rim-protecting big men. Even with blocks and steals documented in nightly box scores, annual awards reflect subjective voter consensus rather than raw production alone.

Why later winners do not solve earlier blind spots

Awards from 1982 onward highlight specific defensive profiles while leaving past decades unaddressed. When Victor Wembanyama earned all 100 first-place votes in April 2026, he did so with the benefit of official tracking across steals, blocks, defensive rebounds, and turnovers. Voters had fifty years of baseline context for those specific metrics.

No such baseline exists for any player active before the 1973-74 season.

When Marcus Smart became the first guard since Gary Payton to win Defensive Player of the Year, the twenty-six-year gap between guard winners illustrated how defensive narratives interact with box-score columns. Perimeter disruption often manifests in turnovers forced, yet turnovers were unrecorded before 1977-78.

The introduction of the three-point line in 1979-80 shifted offensive spacing entirely. Players guarding the perimeter in 1974 operated under completely different spatial demands than those defending modern schemes, but their defensive box-score categories were identical. Modern award results show which skills contemporary voters value. They cannot reconstruct the unmeasured actions of earlier title-winning rosters.

The missing pre-1973 record

Modern statistical databases present smooth numerical tables that create an illusion of unbroken continuity. A reader can open a historical leaderboard and sort descending from the highest block totals in league history down to the single digits.

That sorted list is structurally broken.

Because steals, blocks, offensive rebounds, and defensive rebounds only entered official records in 1973-74, every table presenting cumulative defensive totals is an incomplete record. It reflects only the players who took the floor after the league changed its bookkeeping. The older names simply sit outside the ledger.

The league has not released retroactive updates to populate those blank spaces. Score sheets from the 1950s and 1960s did not log the categories in real time. The defensive records from basketball's first quarter-century will remain unmeasured because the tallies were never taken.