ON THE TRACKS This weekend's schedule

NASCAR NEXTEL CUPSamsung/RadioShack 500Fort Worth, Texas
Schedule: Today, qualifying (Speed Channel, 4:10 p.m.); Sunday, race (FOX, 1 p.m.).Track: Texas Motor Speedway (oval, 1.5 miles, 24 degrees banking in turns).Race distance: 500 miles, 334 laps.Last race: Kurt Busch won his third straight race at Bristol and fourth in the last five tries at the track after taking the Food City 500. Busch angered his pit crew by passing up a tire change with the other leaders under caution 119 laps from the end of the 500-lap race, but still managed to hold off Rusty Wallace.Last year: Ryan Newman passed Dale Earnhardt Jr. with 10 laps to go and went on to win the Samsung/RadioShack 500 to become the seventh different winner in as many races at Texas Motor Speedway. Earnhardt edged Jeff Gordon in a photo finish for second.Fast facts: Wallace's winless drought reached 104 races despite leading 100 laps at Bristol. ... Jamie McMurray was fined $10,000 by NASCAR on Tuesday and placed on probation until the end of August for spinning out Matt Kenseth at Bristol.
BUSCH SERIESO'Reilly 300Fort Worth, Texas
Schedule: Saturday, race (FOX, 2 p.m.).Track: Texas Motor Speedway (oval, 1.5 miles, 24 degrees banking in turns).Race distance: 300 miles, 200 laps.Last race: Martin Truex Jr. pulled away after a restart nine laps from the finish and won the Sharpie Professional 250 at Bristol for his first Busch victory.Last year: Joe Nemechek won the O'Reilly 300, crossing the finish line under caution in an event marred by two red flags and eight other caution periods. Nemechek was in front on the restart on the 196th of 200 laps after the second red flag, brought out by a chain-reaction accident that involved 15 cars and caused a 22-minute stoppage.Fast facts: Truex is the first Busch regular to win a race this year. The previous events were won by Nextel Cup stars Dale Earnhardt Jr., Jamie McMurray, Kevin Harvick and Greg Biffle. ... Nemechek leads all drivers with four top-five finishes at the track.
FORMULA ONEBahrain Grand PrixBahrain
Schedule: Saturday, qualifying (Speed Channel, 7 a.m.); Sunday, race (Speed Channel, 7 a.m.).Track: Bahrain International Circuit (road course, 3.37 miles, 12 turns).Race distance: 191.87 miles, 57 laps.Last race: Michael Schumacher won his second consecutive race of the season by taking the Malaysian Grand Prix on March 21. It was the 72nd career victory for the six-time world champion, who finished 5 seconds ahead of Juan-Pablo Montoya in a Williams-BMW on the 3.3445-mile Sepang International Circuit.Last year: Inaugural raceFast facts: The Bahrain Grand Prix is the first of two new races on the 2004 schedule. ... The track opened on March 17. ... Britain's Jenson Button recorded his first podium finish in 68 races at Malaysia.
NHRASummitRacing.com NationalsLas Vegas
Schedule: Today, qualifying, 5 p.m.; Saturday, qualifying, 4:30 p.m. (ESPN2, 10 p.m., tape); Sunday, eliminations, 1 p.m. (ESPN2, 11 p.m., tape).Track: The Strip at Las Vegas Motor Speedway.Last event: Andrew Hines became the first driver to earn an NHRA victory on a Harley-Davidson, winning the Pro Stock Bike final at the Gatornationals in Gainesville, Fla., on March 21. Tony Schumacher earned his second win of the season in the Top Fuel, Del Worsham took the Funny Car final and Greg Anderson won Pro Stock.Last year: Larry Dixon ran his winning streak at Las Vegas to three after taking Top Fuel. Tony Pedregon (Funny Car) and Greg Anderson (Pro Stock) also won.Fast facts: Kenny and Brandon Bernstein became the first father-son combination to win at the same event in 2001. Kenny recorded his first Top Fuel victory in over a year while Brandon took the Top Alcohol Dragster category. ... This is the fourth year of the event.
-- Associated Press