Ken Roczen is your fastest qualifier in Arlington. (Photo: Frank Hoppen / Supercrossonline.com)

is your fastest qualifier in . (Photo: Frank Hoppen / Supercrossonline.com)

Here are five things you need to know about round seven of the Monster Energy Championship in Arlington, Texas:

ROCZEN FASTEST 450 QUALIFIER

After two timed sessions, Ken Roczen emerged as the fastest rider in the 450SX Class. The rookie jumped to the top spot on his final lap with a with a time of 45.469, one tenth of a second quicker than . Behind Stewart was reigning Champion , Justin Barcia and Justin Brayton. 2010 Champion Ryan Dungey qualified sixth followed the RCH Racing duo of Josh Hill and Broc Tickle. Andrew Short and Eli Tomac rounded out the top 10.

REED WILL NOT RACE

Chad Reed will not race in Arlington due to the injuries he sustained in a crash last weekend in San Diego. Reed confirmed the news via his Twitter account, stating that his shoulder “popped out” during the second and final timed session. He immediately left the stadium to get an MRI and additional x-rays.

250 EAST REGION KICKS OFF

The 250 Class is split into West and East regions, with the latter beginning tonight in Arlington. Pro Circuit Kawasaki looks stout heading into round one of the East Region Championship, with all three of their riders qualifying in the top four. grabbed the top spot with a lap of 46.414, nearly two tenths quicker than teammate . broke up the PC Kawasaki party in third followed by Blake Baggett and Gavin Faith.

TOUGH TRACK CONDITIONS

Riders struggled to stay on two wheels throughout practice and qualifying due to tough track conditions. The hard-packed dirt is extremely slick, causing competitors to slip out easily. In addition, the short start will prove to be tricky throughout the night. Riders will storm into a sharp left-hander with no berm before a difficult rhythm section and large bowl turn. Here’s an animated look at the track:

LIVE ON FOX SPORTS 2

Coverage kicks off on FOX Sports 2 at 8:30 p.m. ET from Cowboys Stadium. You can also watch the race on your mobile phone or computer via the FOX Sports Go. The race will also re-air on FOX Sports 1 Sunday at Midnight ET. If you are unable to find FOX Sports 2 on your television, CLICK HERE.

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