by Jeff Gluck
The 10-lap average is a more reliable stat, and Mark Martin led the way in that category with an average speed of 123.248 mph over his 10-lap run.
Jamie McMurray (123.155) trailed Martin, followed by Ryan Newman, David Ragan and Joey Logano.
Denny Hamlin was next, with Brad Keselowski, Juan Pablo Montoya, Regan Smith and David Reutimann rounding out the top 10.
On the "traditional" practice sheet, the top 10 was: Stewart, Reutimann, Martin, McMurray, Kurt Busch, Jeff Burton, Ragan, Matt Kenseth, Greg Biffle and Hamlin.
The final 60-minute practice session is scheduled to begin at noon Eastern time.
Cup teams were given one set of right-side tires to use for both practices today after a tire issue was discovered yesterday.
Saturday 1st practice - Top 5 Speeds
slowest: #46-Yeley 120.687 and #87-Nemechek 120.786
no speed listed: #92-Setzer
incidents: #38-Kvapil slapped the wall with the right side of the car.
Happy Hour practice - Top 5 Speeds
slowest: #09-Elliott 117.293 and #66-McDowell 117.329
no speed listed: #87-Nemechek
the teams practiced the new tires [D4386], each team had one set to use.