John Ross' Speed Coach Says the Former Washington WR Could've Run a 4.18 40 at the NFL Combine

John Ross broke the NFL Combine record, but his speed trainer, Gary Cablayan, believes he had the potential to run even faster.

John Ross is now the fastest man in NFL Combine history.

Despite a torn labrum, leg cramps and two surgically repaired knees, the wide receiver out of the University of Washington flew into the record books with a 4.22 40-Yard Dash. That blazing time dethroned Chris Johnson's 9-year-old record and sent Ross's draft stock through the roof.

Wanna know the craziest part? According to Gary Cablayan, Ross's speed trainer, he could've run even faster. You'll notice that Ross seems to pull up a bit at the end of his record-breaking run, likely due to those aforementioned leg cramps:

Cablayan recently told TMZ Sports that both he and Ross believe he realistically could've clocked a 4.18. "Everything we did [during training], we tested electronically, just like at the Combine. We time them in the exact same way, so there was no question of where he [could] go," Cablayan said. "We never really talked about the record. It was a possibility, but I like to to keep the pressure off of him. I told him that if he runs a 4.2, only six people in history have done it, so you're good. Don't focus on trying to break the record."

Check out Ross's impressive acceleration at the start of this training clip from Cablayan:

The night before he was to run the 40 at the Combine, Ross was ripping off some absurdly speedy practice starts. So speedy, in fact, that they could've easily translated to a sub-4.2 showing in the 40-Yard Dash.

"The night before, some of his starts were actually looking really good. So it was kind of like, 'Whoa, OK. He's definitely going to run a 4.2.' I think everyone kinda knew that, and I think that gave him the extra confidence. When you have confidence, anything can really happen. If he would've hit that type of start on Combine day and didn't feel that little cramp come on in the last 10 [yards], then we both thought he could've gone 4.18," Cablayan said.

Cablayan's client list includes a number of Olympic sprinters and noted NFL speedster DeSean Jackson. He also trained Boise State running back Jeremy McNichols for this year's NFL Combine, helping him tweak his running mechanics and post an impressive 4.49. "I used to run really heavy on my toes and even swing my legs out when I ran," McNichols told STACK. "Coach G had me do more heel striking to give me more power. I think he's one of the top speed coaches in the entire country."

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Photo Credit: Getty Images // Thinkstock

Topics: FOOTBALL | WIDE RECEIVER | NEWS | 40-YARD DASH | NFL COMBINE | NFL | NFL DRAFT | JOHN ROSS | WASHINGTON HUSKIES