Good clip to discuss!
My leagues are Men’s College & HS (NFHS)
So, let’s take a look at the NCAA-M Screening Rule first, then we will break down the differences in the NFHS Screening Rule. Comments/Constructive Criticism is welcome & encouraged. It’s how we grow.(Thread) https://twitter.com/deepdiveref/status/1293185471430836234

NCAA-M Rule 4-35.3b,c & 4-35.4

The key factor in this play, w/ regard to the NCAA-M Screening Rule, is that the screener was moving and caused contact that delayed opponent from reaching desired position. This illegal contact put the defender at a disadvantage.

Although the verbiage “Time & Distance” doesn’t appear in NCAA-M Screening Rule, there are some relating principles that apply when ruling on screening a moving opponent. Such as Rule 4-35-3c.
“Distance” is inferred by “take a position so close to a moving opponent”

For Refs who work both College & HS , knowing the differences in Rulebook terminology, across those 2 rule sets, is vital. When we communicate w/ coaches, it’s imperative that we use correct verbiage found in their league Rulebook.

Now, back to the play.
1) Screener takes position that doesn’t allow moving opponent to avoid contact
2)Sets screen, while moving, that causes contact & delays opponent from reaching desired position.
By NCAA-M rule, this is an Illegal Screen.

Now, let’s address NFHS Screen Rule

NFHS Rule 4-40 (Screen)

The NFHS has a more detailed description of legal/illegal screening actions. There are some similarities between their rule & the NCAA-M’s, but there are also notable differences...

The 2 biggest differences are found in the NFHS screen rule that defines “Legal Screening Postion”(4-40-2)

-(b)“Time & Distance” are relevant
-(c) Screener must be stationary
*Exception to (c) doesn’t apply in the play we’re discussing*

The play above deals w/ screening a moving opponent. NFHS is pretty clear on what is required to establish a legal screening position on a moving opponent. In fact, it’s directly addressed in Rule 4-40-5.
*Note- “Time & Distance” & “Stationary Position” both appear in this rule.

NFHS Ruling on this play: Illegal Screen

Reasoning:
1)Screener isn’t stationary upon contact
2)Time/Distance weren’t allowed for the moving defender to avoid contact

To Coaches/Refs at amateur level-

This illegal screen may have been obvious to you. Good.
However, it’s easy to say something’s illegal, but it’s another thing entirely to understand & be able to explain WHY it’s illegal, BY RULE. The more we know, the more we grow! /END THREAD