Webb quickly moved his way into the lead, but Tomac had other ideas quick retaking the lead and running away to a comfortable ten-second win ahead of Webb with Wilson holding on for third, finishing just ahead of Monster Energy Yamaha's
Justin Barcia who came into the night as the championship points leader.
For the third straight round, Australia's
Chad Reed was not able to qualify directly out of his heat through to the main event, finishing in 10th and making another trip to the LCQ.
It was another Monster Energy Kawasaki leading the field early in the second 450 heat, with
Adam Cianciarulo edging out Rockstar Husqvarna's
Zach Osborne through the first turn.
Behind them, HRC Honda's
Ken Roczen quickly moved his way from 5th place into second and quickly went to work on taking the lead away from his training partner.
Just after mid-race, Roczen made is an attack, moving by Cianciarulo then holding on to a 1.5-second race win.
Rockstar Husqvarna's
Jason Anderson worked his way through the field to finish third ahead of a fast-charging
Malcolm Stewart who took advantage of two big sets of whoops to move his way forward.
In the LCQ, Reed had the crowd cheering in his last appearance at Anaheim, working his way to the lead and taking a popular LCQ win ahead of
Chris Blose in second,
Ryan Breece in third and
Alex Ray in the final transfer position.