Cardion AB Ducati's Karel Abraham is returning to action this weekend, while Pramac Ducati's Hector Barbera has been ruled out by a broken leg in a training accident.

Barbera has been replaced by former MotoGP race winner Toni Elias, who split from the Aspar Moto2 team after Mugello.

The US GP also sees AMA rider Steve Rapp become the first wild-card entry of the season and first ever for the new CRT class.

Repsol Honda's Dani Pedrosa has one of the new RC213Vs available for Laguna Seca, while team-mate Casey Stoner has the new engine in the present chassis, as he had requested. Ducati are expected to debut 'some' new parts.

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1. Dani Pedrosa ESP Repsol Honda (RC213V) 1m 21.424s
2. Jorge Lorenzo ESP Yamaha Factory Racing (YZR-M1) 1m 21.498s
3. Casey Stoner AUS Repsol Honda (RC213V) 1m 21.829s
4. Ben Spies USA Yamaha Factory Racing (YZR-M1) 1m 21.939s
5. Andrea Dovizioso ITA Monster Yamaha Tech 3 (YZR-M1) 1m 22.609s
6. Cal Crutchlow GBR Monster Yamaha Tech 3 (YZR-M1) 1m 22.672s
7. Valentino Rossi ITA Ducati Team (GP12) 1m 23.216s
8. Stefan Bradl GER LCR Honda MotoGP (RC213V) 1m 23.249s
9. Nicky Hayden USA Ducati Team (GP12) 1m 23.310s
10. Alvaro Bautista ESP San Carlo Honda Gresini (RC213V) 1m 23.537s
11. Colin Edwards USA NGM Forward Racing (Suter-BMW CRT) 1m 24.905s
12. Aleix Espargaro ESP Power Electronics Aspar (ART CRT) 1m 25.169s
13. Karel Abraham CZE Cardion AB Motoracing (GP12) 1m 25.215s
14. Mattia Pasini ITA Speed Master (ART CRT) 1m 25.488s
15. Toni Elias ESP Pramac Racing (GP12) 1m 25.816s
16. Yonny Hernandez COL Avintia Blusens (FTR-Kawasaki CRT) 1m 25.904s
17. James Ellison GBR Paul Bird Motorsport (ART CRT) 1m 25.931s
18. Danilo Petrucci ITA Came IodaRacing (Ioda-Aprilia CRT) 1m 26.125s
19. Michele Pirro ITA San Carlo Honda Gresini (FTR-Honda CRT) 1m 26.421s
20. Randy De Puniet FRA Power Electronics Aspar (ART CRT) 1m 26.703s
21. Ivan Silva ESP Avintia Blusens (FTR-Kawasaki CRT) 1m 27.102s
22. Steve Rapp USA Attack Performance (APR-Kawasaki CRT) 1m 29.814s

Official Laguna Seca MotoGP records: Best lap: Casey Stoner AUS Ducati 1m 20.700s (2008) Fastest race lap: Casey Stoner AUS Ducati 1m 21.376s (2010)