From day 1, coaches were on them (I assume) about proper tackling form, yet we see so many defenders forget that they have arms and that arms are to be used to wrap up the ball carrier after you hit him. Either pull the guy down or hang on and wait for help.
This is the most basic of skills, yet many of the best football players in the world have a hard time with it.
This irritates me almost as much as seeing Kip Wells taking 12 minutes and 15 seconds between pitches for no apparent reason.


