Cal Crutchlow has topped the opening practice session at the US MotoGP at Laguna Seca.
Riding the Monster Yamaha Tech 3 machine Crutchlow clocked 1:22.757s to edge out Yamaha Factory Racing ace Valentino Rossi by less than .10s.
Young Marc Marquez, having his first at the northern California circuit, was third.
Jorge Lorenzo was cleared to race shortly before the session as he posted the 11th fastest time. Lorenzo remained cautious, feeling his way back after twice damaging his left shoulder in recent weeks.
Dani Pedrosa was also cleared however he did not appear in FP1.
LCR Honda rider Stefan Bradl was fourth fastest ahead of Alvaro Bautista.
See below for full Practice 1 results
| 1 | Cal Crutchlow | Tech 3 Yamaha | 1:22.757s | |
| 2 | Valentino Rossi | Yamaha | 1:22.848 | +0.091s |
| 3 | Marc Marquez | Honda | 1:22.980 | +0.223 |
| 4 | Stefan Bradl | LCR Honda | 1:23.033 | +0.276 |
| 5 | Alvaro Bautista | Gresini Honda | 1:23.255 | +0.498 |
| 6 | Andrea Dovizioso | Ducati | 1:23.380 | +0.623 |
| 7 | Aleix Espargaro | Aspar Aprilia | 1:23.905 | +1.148 |
| 8 | Nicky Hayden | Ducati | 1:23.927 | +1.170 |
| 9 | Bradley Smith | Tech 3 Yamaha | 1:24.287 | +1.530 |
| 10 | Randy de Puniet | Aspar Aprilia | 1:24.363 | +1.606 |
| 11 | Jorge Lorenzo | Yamaha | 1:24.441 | +1.684 |
| 12 | Hector Barbera | Avintia FTR-Kawasaki | 1:24.467 | +1.710 |
| 13 | Alex de Angelis | Pramac Ducati | 1:25.133 | +2.376 |
| 14 | Yonny Hernandez | PBM Aprilia | 1:25.309 | +2.552 |
| 15 | Karel Abraham | Cardion Aprilia | 1:25.394 | +2.637 |
| 16 | Hiroshi Aoyama | Avintia FTR-Kawasaki | 1:25.451 | +2.694 |
| 17 | Danilo Petrucci | Ioda-Suter-BMW | 1:25.594 | +2.837 |
| 18 | Colin Edwards | Forward FTR-Kawasaki | 1:25.664 | +2.907 |
| 19 | Claudio Corti | Forward FTR-Kawasaki | 1:25.770 | +3.013 |
| 20 | Michael Laverty | PBM-Aprilia | 1:26.659 | +3.902 |
| 21 | Blake Young | Attack APR-Kawasaki | 1:26.668 | +3.911 |
| 22 | Bryan Staring | Gresini FTR-Honda | 1:26.753 | +3.996 |
| 23 | Lukas Pesek | Ioda-Suter-BMW | 1:27.825 | +5.068 |
