Basketball
Why The Jump Ball After Every Basket Disappeared
The original rules restarted play with a centre jump after every score, and removing it roughly doubled the pace of the game in a single amendment.
Play originally restarted with a jump ball at the centre circle after every score. Removing that single provision transformed the pace of the sport more than any later change.
What the centre jump cost
After each basket both teams walked back to the centre circle, an official tossed the ball, and two players contested it before play could resume.
That sequence took a substantial share of the available time, and in a game with many scores it consumed a large part of every period.
Actual playing time was therefore far shorter than the clock suggested, and scoring totals stayed low simply because there were few possessions.
The competitive distortion it created
A team with a dominant jumper effectively won possession back after conceding, which meant conceding a basket carried a much smaller penalty than it should.
Height at one position therefore determined possession share across the entire game, independent of anything else either team did.
Removing the restart eliminated that dependence, so possession alternated by scoring rather than by a repeated physical contest.
What replaced it
The conceding team inbounds the ball from behind their own baseline, which restarts play within seconds and requires no officials beyond one handing over the ball.
That restart also gives the scoring team an opportunity to press, which created a defensive tactic that had no equivalent under the old rules.
The jump ball survived only for the start of the game and for genuinely contested situations where possession is otherwise undetermined.
The knock-on effect on scoring
Possessions per game rose sharply, and since scoring is roughly proportional to possessions, totals rose with them.
Fatigue became a much larger factor, because continuous play removed the natural rest the walk to the centre circle had provided.
Substitution patterns changed as a result, and squad depth began to matter in a way it had not when the game contained frequent pauses.
Why held balls were reformed too
Jump balls remained for held-ball situations, which encouraged defenders to grab the ball deliberately and force a contest they might win.
Alternating possession replaced the jump in most competitions, awarding the ball to teams in turn rather than staging a fresh contest.
That change removed the incentive to create stoppages, completing the same project the abolition of the centre jump had begun.
