While Jimmie Johnson continues to pursue a championship, many factors loom at Texas Motor Speedway, where Roush Fenway Racing in general and Carl Edwards in particular have excelled.

Roush Fenway drivers have won six of the 15 NASCAR Sprint Cup events held at Texas, including the April race, which Edwards won.

Edwards has two wins, two top fives, two top 10s and one DNF (did not finish) in seven career starts at Texas. He claims the sixth-best pre-race Driver Rating (96.0) and is second in Fastest Laps Run with 177.

Biffle has one win, one top five, two top 10s and four DNFs in nine career starts there. His pre-race Driver Rating for Texas ranks 10th, at 88.8, but he’s second in Fastest Laps Run there with 178.

Former Roush Fenway driver Jeff Burton (No. 31 AT&T Mobility Chevrolet), fourth in the Chase and in his third season with Richard Childress Racing, has two wins, three top fives, seven top 10s and one DNF in 15 career starts at Texas.

He’s also the only driver with two wins there.

Edwards may be on a mini-roll. He won last Sunday at Atlanta Motor Speedway and also won Saturday’s NASCAR Nationwide Series event at Memphis. He has seven wins this season, trailing only Kyle Busch’s (No. 18 M&M’s Toyota) series high of eight.

And Edwards’ wins have come in bunches.

Twice, he’s won back-to-back races in 2008 — at Las Vegas and Atlanta in March, and at Michigan and Bristol in August.