Two wins and two pole positions with a perfect score of 50 points has established a platform for back-to-back world championships.
Marquez, 21, is already the youngest ever world champion following his historic 2013 title.
“At 21 you are ten foot tall and bullet-proof. I know that feeling,” said Schwantz, the 1993 500cc world champion and one of the sport’s most exhilarating racers.
Schwantz reckons that Marquez is feeding off the mental confidence he gains from his fast, fearless and often edgy riding style.
So how to stop the winning ways of Marquez who was untouchable in winning the Texas GP at COTA last week?
“Right now nobody is in Marc’s head, I would try roughing him up in every practice session,” Schwantz said.
“I would ruffle his feathers, I’d brake him late up the inside and move him over onto the curb and try and get into his head.
“He looked untouchable after he won the opening race in Qatar. That kid had not tested for six weeks and the first time he got on the bike was in Qatar and he won and I thought, those other guys are in big trouble.
“The more confidence and fitness he gets, he is going to be kicking everybody’s ass.”
Marquez has won eight of 20 starts since entering MotoGP, a stunning 40 percent win ratio.
His title defense got off to a flying start in Qatar when he was merciless against seven time world champ Rossi who had no response to Marquez’s stellar last lap charge to victory.
Rossi was third in Austin when slowed by excessive front tire wear and he is already 22 points behind.
But the rider in deep trouble for the title is Rossi’s Yamaha teammate Lorenzo, who came within four points of topping Marquez in the 2013 championship.
But an uncharacteristic first lap crash in Qatar and then the brain fade of a jump start in Austin sees Lorenzo with a suffocating 44 point deficit going into the Argentine GP.
Lorenzo needs race wins like oxygen, invading Marquez’s mindset in the hope of destabilizing his rhythm.
“What Jorge did with the jump start in Texas was 100 percent because of Marquez,” said Schwantz of Lorenzo’s meltdown at COTA.
“Marc has been in Lorenzo’s head since he crashed in Qatar and Marc won. Lorenzo is watching a kid who is not 100 percent fit but dominating.
“When these guys get to Europe and Marc is 100 percent, I think it will get worse for all the riders unless they get into his head real quick.
“Marc is 110 percent on every lap, riding on the edge all time and he is just getting much more comfortable doing it. I have never seen anything like it.”
Marquez broke his leg in a dirt bike crash in February just six weeks before the Qatar GP where he raced in a weakened state, loaded up with painkillers. And still won. And then he cruised to victory in Texas.
In advance of Sunday’s Argentine GP Marquez leads the championship on 50 pouts ahead of Pedrosa 36, Rossi 28 with Ducati’s Andrea Dovizioso on 27. Lorenzo is 16th with just four points.
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