Patrick Dangerfield forced to remodel game Patrick Dangerfield will no longer be allowed to go in head first and make contact below his opponent's knees. ADELAIDE'S raging bull midfielder Patrick Dangerfield is being forced to rethink his instinctive head-over-the-ball game - and not because of the new concerns from repetitive concussions. Rather, the AFL lawmakers decision to penalise any player who charges head first into an opponent making contact below the knees has compelled Dangerfield to remodel his game. "I certainly will," Dangerfield said on radio FIVEaa yesterday. The rule is not going to change - so we, as players, must adapt to the rules that are implemented for this season. If you don't do that, you are going to give away a free kick. Law 15.4.5 (a) ii was rewritten by the AFL Laws of the Game Committee in the off-season for two reasons. First, to protect players whose lower legs were being threatened by sliding rivals, as evidenced by Collingwood midfielder Scott Pendlebury missing six weeks last season when his shins were rattled by a rival charging at him head first; and to stop players staging by ducking their heads for head-high free kicks. Caught in-between are players such as Dangerfield, who instinctively drops his head to work over a loose ball. "As players, it is going to take a little bit of getting used to because your instinct is to hunt the ball," Dangerfield said. Now you have to be aware of who is around you ... and be delicate, I guess, with their legs. The bonus benefit of less hits to Dangerfield's head may not be guaranteed by the rule change. His head-down approach had Dangerfield dazzled again - this time by the friendly fire of team-mate Mitch Grigg in Saturday's trial against Fremantle. But Dangerfield yesterday was dismissive of the latest medical advice that players who suffer serious concussion - as he has - not play football again. "Most players have experienced concussion - and it is certainly an issue we take seriously at the club," Dangerfield said. Players need to be aware if they are pushing too hard after a head knock. And at our club we have great faith in how we are cared for by our club doctor Andrew Potter. Football's difficult debate on concussion is open again after the declarations from Brownlow Medallist Greg Williams that he continues to suffer today from his multiple concussions from his playing career with Geelong, Sydney and Carlton. ADELAIDE last night formally confirmed lead ruckman Sam Jacobs has extended his contract for three seasons to the end of 2016.