Nicholas "Nicky" Patrick Hayden (born July 30, 1981 in Owensboro, Kentucky) also known as The Kentucky Kid is an American professional motorcycle racer and MotoGP World Champion in 2006.
For 2006, Hayden was charged with spearheading Repsol Honda's championship aspirations, and was the only rider to be handed the full 2006 Honda bike during preseason testing. He led the championship from the third race and looked set to break Valentino Rossi's championship-winning streak, which had dated back to 2001. Capturing the championship was not without peril: in the second to last round at Estoril in Portugal, teammate Dani Pedrosa missed his braking point while following Hayden. The resulting lowside accident took out both bikes, with Rossi claiming second place in that race, finishing 0.002 seconds behind Toni Elias. This left Hayden eight points behind Rossi in the championship with one race left to go. In the last race of the season on October 29, 2006, the unexpected happened when Rossi fell off his motorcycle on lap 5 trying to make up for a poor start. Hayden subsequently won the title at the Valencia season finale, during which Pedrosa waved him past early in race; but Puig said the American had acted like a "hypocrite" and is "jealous".winning the championship by finishing 3rd (9.3s) behind race winner Troy Bayliss and Loris Capirossi. He thus beating Rossi 252 points to 247. , Hayden managed the feat even with only two race wins in the season.
On September 22, 2006, Hayden signed a two-year agreement that allowed for him to race for and develop with the factory Honda Racing Corporation (HRC) team for the 2007 and 2008 MotoGP seasons. He has already begun testing the new 800 cc Honda RC212V. His MotoGP racing number changed from 69 to 1 for the 2007 season.
2007 started and finished badly for him, with the Nicky struggling with performance, and team-mate Dani Pedrosa having showed what the Honda was able to do. A crash at Le Mans dropped him to eleventh in the standings at this stage. However, during testing before Donington, he requested that most of the electronics be switched off and his times improved. His subsequent performance in a wet Donington and a dry Assen showed a slight return to form, challenging for fifth with his trademark sliding and tail-out non-standard lines. However, he ultimately kept crashing, with a pole and 3 podiums but no victories proved to be the worse defence of a championship ever recorded. The 2007 season also saw the release of an authorized biography on Nicky and his brothers--The Haydens: Nicky, Tommy, & Roger, from OWB to MotoGP--timed to coincide with his return to the Red Bull U.S. Grand Prix at Mazda Raceway Laguna Seca.
In 2008, Puig claimed the American used to copy Pedrosa's settings because he does not know how to set up a bike, was never a rival to Pedrosa and is a hypocrite for saying he does not have a problem with Pedrosa.
Former 500cc race winner Puig was asked by the official MotoGP website about the wall which now divides the Repsol Honda pits following Pedrosa's shock mid-season switch to Bridgestone.
Hayden does not like the idea of a team being separated.
"All I can say is that Hayden may be bothered because now he can't access information and telemetry data from Dani's bike," replied Puig.
"With this information he was able to improve his riding, as he had all of Dani's references and now he can't use that any longer. He was simply copying as he never knew how to set up a bike."
Puig's claims are not reflected in the results: in the three races since the pits were divided, Hayden has enjoyed his best form of the season, claiming two podium finishes and beating Pedrosa twice. In that time Hayden has scored 47 points, while Pedrosa has managed just 24.
Puig said the relationship between the riders has not been the same since they collided at the 2006 Portuguese Grand Prix, resulting in Hayden losing the World Championship lead with one further round to contest.
Hayden subsequently won the title at the Valencia season finale, during which Pedrosa waved him past early in race; but Puig said the American had acted like a "hypocrite" and is "jealous".
"Everything changed with the incident in Portugal, where Dani made a mistake during the race and apologised for it afterwards," said Puig.
"Nicky eventually won the title and Dani did what he had to do in Valencia, which was to help him. But from that point - even if Hayden denies it - all he's been doing has been talking about how Dani was 'weird' and bringing the people around Pedrosa into the subject.
"He shouldn't act like a hypocrite and say that he doesn't have a problem with Dani, because since that incident in Portugal I think he has talked to him about twice.
"He shouldn't involve Dani's manager in this just because he's jealous of another rider."
Puig played down any rivalry on track between Pedrosa and Hayden as in the last two seasons the Spaniard has outperformed his team-mate.
"Honestly, and without trying to offend anyone, there was never a rivalry in the garage," he said.
"Nicky won the title when Dani was in his first MotoGP season, and since then there was no rivalry because he [Hayden] didn't get the results.
"On his own, Dani gained experience in this class and Nicky was always behind him, so Nicky has never been a serious rival."
Crash.Net / Eurosport
A heel injury sustained in a motocross crash put him out of two rounds
Relations within the team had already petered out, and there was further friction when Pedrosa switched tyre suppliers midseason (from the struggling Michelin to the dominant Bridgestone) without Hayden being consulted. Nicky stated "I've never been put in the conditions to choose. Once they told me that I would have just wasted my time had I even only thought about asking for Bridgestone tyres...I'm not surprised they've given them to him. Besides, at Misano I didn't even have the same fork Dani had... No way would I think they'd let me try the new tyres." 
This incident lent weight to the rumours that Hayden and Honda would part ways for the next season
The rumour was confirmed on September 12th, 2008, when Hayden stated during a Dorna press conference, "It's no secret. Everybody knows where my next stop is going to be...But officially we're waiting to do it the right way, until the releases come out, because there's teams and stuff..." 
By the middle of 2008 it was strongly suspected by fans, media, and the MotoGP paddock already, and later supported by Hayden's own admission during a press conference that he would be leaving Honda, that Hayden would be joining the Ducati Marlboro Team to ride alongside Casey Stoner for the 2009 MotoGP season. This was confirmed on 15th September 2008 thus ending his ten year relationship with Honda.
| Seas | Class | Moto | Race | Win | Pod | Pole | FLap | Pts | Plcd | WCh |
|---|---|---|---|---|---|---|---|---|---|---|
| 2003 | MotoGP | Honda RC211V | 16 | 0 | 2 | 0 | 0 | 130 | 5th | - |
| 2004 | MotoGP | Honda RC211V | 15 | 0 | 2 | 0 | 0 | 117 | 8th | - |
| 2005 | MotoGP | Honda RC211V | 17 | 1 | 6 | 3 | 2 | 206 | 3rd | - |
| 2006 | MotoGP | Honda RC211V | 17 | 2 | 10 | 1 | 2 | 252 | 1st | 1 |
| 2007 | MotoGP | Honda RC212V | 18 | 0 | 3 | 1 | 1 | 127 | 8th | - |
| Total | 83 | 3 | 23 | 5 | 5 | 832 | 1 |
| Class | Seas | 1st GP | 1st Pod | 1st Win | Race | Win | Pod | Pole | FLap | Pts | WCh |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MotoGP | 2003-2007 | 2003 Japan | 2003 Pacific | 2005 USA | 83 | 3 | 23 | 5 | 5 | 832 | 1 |
| Total | 2003-2007 | 83 | 3 | 23 | 5 | 5 | 832 | 1 |
| Yr | Class | Team | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | Championship | Pts |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2003 | MotoGP | Honda | JPN 7 | SAF 7 | SPA Ret | FRA 12 | ITA 12 | CAT 9 | NED 11 | GBR 8 | GER 5 | CZE 6 | POR 9 | BRA 5 | PAC 3 | MAL 4 | AUS 3 | VAL Ret | 5th | 130 | ||
| 2004 | MotoGP | Honda | SAF 5 | SPA 5 | FRA 11 | ITA Ret | CAT Ret | NED 5 | BRA 3 | GER 3 | GBR 4 | CZE Ret | POR Inj | JPN Ret | QAT 5 | MAL 4 | AUS 6 | VAL Ret | 8th | 117 | ||
| 2005 | MotoGP | Honda | SPA Ret | POR 7 | CHN 9 | FRA 6 | ITA 6 | CAT 5 | NED 4 | USA 1 | GBR Ret | GER 3 | CZE 5 | JPN 7 | MAL 4 | QAT 3 | AUS 2 | TUR 3 | VAL 2 | 3rd | 206 | |
| 2006 | MotoGP | Honda | SPA 3 | QAT 2 | TUR 3 | CHN 2 | FRA 5 | ITA 3 | CAT 2 | NED 1 | GBR 7 | GER 3 | USA 1 | CZE 9 | MAL 4 | AUS 5 | JPN 5 | POR Ret | VAL 3 | 1st | 252 | |
| 2007 | MotoGP | Honda | QAT 8 | SPA 7 | TUR 7 | CHN 12 | FRA Ret | ITA 10 | CAT 11 | GBR 17 | NED 3 | GER 3 | USA Ret | CZE 3 | SMR 13 | POR 4 | JPN 9 | AUS Ret | MAL 9 | VAL 8 | 8th | 127 |
| 2008 | MotoGP | Honda | QAT 10 | SPA 4 | POR Ret | CHN 6 | FRA 8 | ITA 13 | CAT 8 | GBR 7 | NED 4 | GER 13 | USA 5 | CZE Inj | SMR DNS | IND 2 | JPN 5 | AUS 3 | MAL - | VAL - | 6th | 131 |