Webb maintained his hold of the red plate as points leader, with his advantage sitting at 38 points over teammate Jeremy Martin, who moved into second. Savatgy, who finished fourth overall (4-5), dropped to third and trails Webb by 50 points.
"I'm happy to leave with a moto win today and maintain our points lead in the championship," said Webb. "The goal for me is always to win, but I knew Alex and Jeremy would be strong today and I'm happy to have been battling with them for the win."
The Lucas Oil Pro Motocross Championship will continue next weekend as it returns to the West Coast for the ninth round of the 2016 season in Washougal, Washington.
Main Photo: Roczen returned to his dominant ways at Spring Creek for his sixth win of the season.
Credit: Simon Cudby
Lucas Oil Pro Motocross Championship - Spring Creek MX Park - Millville, Minnesota - Round 8 of 12
450 Class Overall Results (Moto Finish)
1 Ken Roczen, Germany, Suzuki (1-1)
2 Marvin Musquin, France, KTM (2-3)
3 Eli Tomac, Cortez, Colo., Kawasaki (3-2)
4 Christophe Pourcel, France, Husqvarna (5-4)
5 Justin Barcia, Monroe, N.Y., Yamaha (4-5)
6 Trey Canard, Edmond, Okla., Honda (6-6)
7 Andrew Short, Colorado Springs, Colo., KTM (8-8)
8 Benny Bloss, Oak Grove, Mo., KTM (7-10)
9 Justin Brayton, Fort Dodge, Iowa, KTM (9-9)
10 Phil Nicoletti, Cohocton, N.Y., Yamaha (14-7)
450 Class Championship Standings
1 Ken Roczen, Germany, Suzuki - 387
2 Eli Tomac, Cortez, Colo., Kawasaki - 332
3 Marvin Musquin, France, KTM - 243
4 Justin Barcia, Monroe, N.Y., Yamaha - 215
5 Christophe Pourcel, France, Husqvarna - 202
6 Broc Tickle, Holly, Mich., Suzuki - 171
7 Cole Seely, Newbury Park, Calif., Honda - 151
8 Justin Brayton Fort Dodge, Iowa, KTM - 144
9 Justin Bogle, Cushing, Okla., Honda - 136
10 Ryan Dungey, Belle Plaine, Minn., KTM - 131
250 Class Overall Results (Moto Finish)
1 Jeremy Martin, Millville, Minn., Yamaha (2-1)
2 Cooper Webb, Newport, N.C., Yamaha (1-2)
3 Alex Martin, Millville, Minn., Yamaha (3-4)
4 Joey Savatgy, Thomasville, Ga., Kawasaki (4-5)
5 Aaron Plessinger, Hamilton, Ohio, Yamaha (5-6)
6 Adam Cianciarulo, Port Orange, Fla., Kawasaki (7-8)
7 Arnaud Tonus, Switzerland, Kawasaki (8-9)
8 Mitchell Harrison, Brighton, Mich., Yamaha (11-10)
9 RJ Hampshire, Hudson, Fla., Honda (10-11)
10 Luke Renzland, Hewitt, N.J., Yamaha (9-12)
250 Class Championship Standings
1 Cooper Webb, Newport, N.C., Yamaha - 337
2 Jeremy Martin, Millville, Minn., Yamaha - 299
3 Joey Savatgy, Thomasville, Ga., Kawasaki - 287
4 Alex Martin, Millville, Minn., Yamaha - 270
5 Zach Osborne, Abingdon, Va., Husqvarna - 237
6 Austin Forkner, Richards, Mo., Kawasaki - 221
7 Aaron Plessinger, Hamilton, Ohio, Yamaha - 217
8 Arnaud Tonus, Switzerland, Kawasaki - 163
9 RJ Hampshire, Hudson Fla., Honda - 153
10 Adam Cianciarulo, Port Orange, Fla., Kawasaki - 150