Add something absurd to any sports......

[BrianSoddingBoru4]

Polo:  The horses ride the players.

Football:  Three teams in every match, three nets, five balls in play at all times.

Tennis:  Use volley ball nets and golf balls.

Golf: Clubs may only be swung one-handed.

Basketball: No players over 5'5" tall.

Cricket:  Explosive wickets.

American football:  Give it a sensible fucking name.

Baseball: All players must wear two gloves.

Croquet:  Ban it for being a stupid bloody waste of time.

Rugby: No changes are recommended or indeed possible, as rugby is the most perfect sport ever to be devised by human ingenuity.

Boru

[Brian37]

Football: No time out can be more than one minute long.

Basketball: Anybody who dribbles on the floor has to clean it up.

Cricket:

Not sure what sport you are watching, but time requested by the team are only 30 seconds.  Injury and clock time outs are different. 

Basketball, no hoops.

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Polo:  The horses ride the players.

Football:  Three teams in every match, three nets, five balls in play at all times.

Tennis:  Use volley ball nets and golf balls.

Golf: Clubs may only be swung one-handed.

Basketball: No players over 5'5" tall.

Cricket:  Explosive wickets.

American football:  Give it a sensible fucking name.

Baseball: All players must wear two gloves.

Croquet:  Ban it for being a stupid bloody waste of time.

Rugby: No changes are recommended or indeed possible, as rugby is the most perfect sport ever to be devised by human ingenuity.

Boru

Baseball, "Two gloves"....... LOVE IT, especially with the pitcher. They have to pitch wearing the glove.

[A. Secular Human]

Football: No time out can be more than one minute long.

Basketball: Anybody who dribbles on the floor has to clean it up.

Cricket:

The bowler has to skip-to-my-Lou before delivery.

[The Valkyrie]

Hockey: razor sharp sticks and explosive balls.

Beach volleyball: fully armoured.

[Tiberius]

American Football: make it literal. No more passing or carrying the ball, you have to kick it on every play.

[Minimalist]

..... sounds like the Jets.

[Astreja]

Trampoline basketball.

Baseball with water balloons.

Hockey with cupcakes.

[Draconic Aiur]

Every football player has to drink a gallon of milk before playing

[Brian37]

Hockey: razor sharp sticks and explosive balls.

Beach volleyball: fully armoured.

HA HA HA...... These answers are getting South Park ridiculous...... KEEP EM COMING!

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Baseball, no bases, not even a home plate.

[Gawdzilla Sama]

Polo:  The horses ride the players.

Football:  Three teams in every match, three nets, five balls in play at all times.

Tennis:  Use volley ball nets and golf balls.

Golf: Clubs may only be swung one-handed.

Basketball: No players over 5'5" tall.

Cricket:  Explosive wickets.

American football:  Give it a sensible fucking name.

Baseball: All players must wear two gloves.

Croquet:  Ban it for being a stupid bloody waste of time.

Rugby: No changes are recommended or indeed possible, as rugby is the most perfect sport ever to be devised by human ingenuity.

Boru

ANY time-out. Including commercial breaks. And any time a team doesn't hike the ball within one minute possession changes.