The second moto saw GEICO Honda's Christian Craig claim the Motosport.com Holeshot Award and as the field shuffled into place on the opening lap, Musquin, Webb and Martin once again positioned themselves in the lead group by slotting into second, third and fourth behind Craig.
A battle for second between Musquin and Webb allowed Craig to open a gap during the first couple laps before Webb was able to make the pass stick and take over second on Lap 2. Musquin continued to lose ground in the ensuing laps and soon gave up third to his championship rival Martin on Lap 6. He would eventually drop out of the top five.
A couple laps later the focus of the race returned to the front as Webb closed in on Craig and made an aggressive pass for the lead on Lap 8. He was able to pull away quickly and appeared to be in full control of the moto. However, with the overall win in his sights Webb made a costly mistake on Lap 13 and fell. At that same moment Martin was making a pass on Craig for second, but it turned into the lead as both riders rode by Webb as he picked up his bike.
Martin was able to pull away from Craig easily, while Webb reentered the action in fourth behind Osborne. The reigning champion went on to secure the overall win by 4.947 over Osborne, who passed Craig for second with two laps remaining. Craig held on to finish third for the first podium result of his career. CycleTrader.com/Rock River Yamaha's Alex Martin was fourth, with Webb fifth and Musquin sixth.
Martin's fourth overall win of the season (1-1) is the most in all of Lucas Oil Pro Motocross. Osborne finished in the runner-up spot (3-2) to tie a career-best result, while Webb managed to stay on the podium despite his adversity in third (2-5). Musquin finished sixth overall (4-6), his second worst result of the season.
"I got off to two really good starts. I was leading the first moto and then my arms got tired. I really struggled for a while but I found a way to turn it around and get back up there. Marvin and I battled a lot today (for the first time this season). We've been dodging each other all season, but today was the day we battled.
"He's a phenomenal racer and he keeps me on my toes. I saw a yellow flag and thought it was cooper and it ended up being him, so I just tried to pick a line and make a move and it worked. I got lucky there."
Musquin entered RedBud with a 10-point lead over Martin in the 250 Class championship standings, but a 17-point swing in Martin's favor now puts the defending titleholder back top the points for the third time this season. He carries a seven-point lead over Musquin into the next round of the season, while Osborne currently sits third, 91 points out of the lead.
"Today could have been worse. When I crashed [at Thunder Valley] I bruised the bone in my wrist and stretched the ligaments, so it's been tough and I've been dealing with this [since Round 3]," said Musquin. "I've actually been doing really good at the races but this week I tweaked it again. I heard a pop in my wrist and it hurt again.
"I knew [today] would be tough, but not that tough. This was one of my worst races. It felt good at the beginning of the motos, and my speed was good, but it just got worse and worse later in the race."
Australia's Hayden Mellross finished the day in 21st position after a 26th place finish in the opening moto followed by 19th in moto 2
The Lucas Oil Pro Motocross Championship will take its second break in action of the 2015 season next weekend before returning to competition on July 18 with the La Crescent Wine and Spirits Spring Creek National from Spring Creek MX Park in Millville, Minnesota. It will serve as the eighth stop of the 12-round championship.
450 Class (Moto Finish)
Justin Barcia, Monroe, N.Y., Yamaha (2-1)
Ryan Dungey, Belle Plaine, Minn., KTM (1-2)
Ken Roczen, Germany, Suzuki (3-3)
Broc Tickle, Holly, Mich., Suzuki (4-7)
Weston Peick, Wildomar, Calif., Yamaha (5-6)
Christophe Pourcel, France, Husqvarna (10-4)
Fredrik Noren, Sweden, Honda (7-8)
Blake Baggett, Grand Terrace, Calif., Suzuki (6-9)
Justin Brayton, Fort Dodge, Iowa, KTM (9-10)
Thomas Hahn, Great Bend, Texas, Honda (8-12)
450 Class Championship Standings
Ryan Dungey, Belle Plaine, Minn., KTM, 303
Ken Roczen, Germany, Suzuki, 259
Justin Barcia, Monroe, N.Y., Yamaha, 240
Blake Baggett, Grand Terrace, Calif., Suzuki, 212
Jason Anderson, Edgewood, N.M., Husqvarna, 197
Broc Tickle, Holly, Mich., Suzuki, 190
Christophe Pourcel, France, Husqvarna, 186
Weston Peick, Wildomar, Calif., Yamaha, 171
Phil Nicoletti, Cohocton, N.Y., Yamaha, 151
Fredrik Noren, Sweden, Honda, 132
250 Class (Moto Finish)
Jeremy Martin, Millville, Minn., Yamaha (1-1)
Zach Osborne, Abingdon, Va., Husqvarna (3-2)
Cooper Webb, Newport, N.C., Yamaha (2-5)
Christian Craig, Plymouth, Minn., Honda (6-3)
Alex Martin, Millville, Minn., Yamaha (5-4)
Marvin Musquin, France, KTM (4-6)
Aaron Plessinger, Hamilton, Ohio, Yamaha (9-9)
Chris Alldredge, Powell Butte, Ore., Kawasaki (8-10)
Jessy Nelson, Paso Robles, Calif., KTM (7-11)
RJ Hampshire, Hudson, Fla., Honda (14-8)
250 Class Championship Standings
Jeremy Martin, Millville, Minn., Yamaha, 298
Marvin Musquin, France, KTM, 291
Zach Osborne, Abingdon, Va., Husqvarna, 207
Joey Savatgy, Thomasville, Ga., Kawasaki, 191
Alex Martin, Millville, Minn., Yamaha, 188
Jessy Nelson, Paso Robles, Calif., KTM, 188
Adam Cianciarulo, Port Orange, Fla., Kawasaki, 178
Matt Bisceglia, Tualatin, Ore., Honda, 142
Aaron Plessinger, Hamilton, Ohio, Yamaha, 142
Chris Alldredge, Powell Butte, Ore., Kawasaki, 137
Top Image: Barcia has won two in a row.
Credit: Simon Cudby