Yes. The only illegal tackles are the horse-collar (grabbing the jersey collar from the back), grabbing the facemask, or leading with the helmet (e.g., spearing or helmet-to-helmet contact). The NFL also disallows tackling by tripping, but this is rarely called.
If a player wants to have a bunch of hair flying around outside his helmet, he does so at his own peril. It would be an unfair advantage if the defender was forced to carefully avoid the hair when trying to make a tackle.
Yes, an interception occurs when a defensive player catches a ball thrown by the quarterback.
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Yes, an interception occurs when a defensive player catches a ball thrown by the quarterback.
The batter is out, if they hit a ball in the air and a defensive player catches the ball before it touches the ground, in fair or foul territory. If a defensive player has the ball in control and touches a base before the runner, the runner is out. If a defensive player has the ball in control and touches the runner with the ball in their hand or glove, the runner is out.
Remorse or your past conduct
In college football, once a player's knee touches the ground the play is whistled dead regardless of whether a defensive player made contact with the ball carrier. In the NFL, a defensive player must make contact with the ball carrier to have the play whistled dead. So to answer your question, in college the player is down and the play is over. In the NFL, the player is not down and the play continues.
No, whether in Basketball or Football, a player may not step out of bounds and receive the ball. However, once another player touches the ball, other than the one currently holding the ball, that player may receive the ball.
No, the glove is considered an extension of the fielder's hand so if the glove comes off the fielder is deemed to have dropped the ball.
A defensive player may hold on to a ball carrier's jersey in an attempt to tackle him. However, if a defensive player holds on the the jersey of an offensive player who does not have the ball, that would be a penalty for holding. Likewise, if an offensive player holds on to a defensive player's jersey, that would also be called holding.
In American Football, if a player has one foot out of bounds when he catches the football, he is out of bounds. If he has is in bounds when he catches the football then he caught it and it is a completed catch. If the player goes out of bounds and comes back in bounds and catches the football it is still an incomplete pass. However, if he was knocked out of bounds or if the ball was tipped, it may be a completed pass. The rules keep changing at all levels of the game.
Defensive offsides is when a defensive player crosses the line of scrimmage, the yard line on which the ball is placed before the play begins, when the quarterback snaps the ball. The defensive player is allowed to accidentally jump across the line of scrimmage as long as he gets back to the defensive side of the ball before the ball is snapped. Offsides is a five yard penalty and a replay of down.
The ball cannot be offside. Players can be in an offside position.