many DL are taught to grab at the QB's arm- if possible- cuz they are often moving and about to throw and tackling them kinda high gives the D a shot at a fumble while tackling the QB. In most cases, I think it's a fine tactic and we'll get some INTs or Fumbles that way...but when it doesn't work...whew...it hurts!! lol
Perhaps they should only use that tackling mechanic with most - not all QBs and just get the UNBELEIVABLY athletic ones to the ground(Murray, Wilson, Jackson, Allem, etc). I'm fine with a strategy like that cuz those QBs are somethin else when they start slipping the pocket.
"L'audace, l'audace. Toujours l'audace!"