Final round-by-round results from the 22nd annual O'Reilly NHRA Spring Nationals presented by Pennzoil at Houston Raceway Park, the fourth of 24 events in the NHRA Full Throttle Drag Racing Series:

TOP FUEL:

ROUND ONE -- Cory McClenathan, 3.873, 311.27 def. Shawn Langdon, 10.272, 71.86; Larry Dixon, 3.856,313.44 def. Urs Erbacher, 4.072, 224.85; Clay Millican, 3.893, 307.23 def. Troy Buff, 5.893, 103.52; Antron Brown, 3.840, 313.88 def. Todd Simpson, broke; Brandon Bernstein, 3.887, 315.49 def. Terry Haddock, 3.958, 304.05; Tony Schumacher, 3.897, 308.78 def. Del Cox Jr, 3.974, 300.80; Morgan Lucas, 4.636, 220.69 def. David Baca, 6.799, 88.03; Joe Hartley, 4.004, 303.43 def. Spencer Massey, 5.274, 138.37;

QUARTERFINALS -- Schumacher, 4.434, 230.37 def. Lucas, 4.434, 230.37; Hartley, 4.083, 294.31 def. Millican, 5.142, 152.07; Dixon, 4.400, 248.43 def. Bernstein, 5.072, 165.17; McClenathan, 3.909, 303.23 def. Brown, 3.883, 310.63;

SEMIFINALS -- Schumacher, 3.895, 310.91 def. Dixon, 3.889, 307.02; McClenathan, 3.985, 296.70 def. Hartley, 5.082, 150.18;

FINAL -- Schumacher, 3.881, 314.75 def. McClenathan, 3.880, 313.66.

Final round-by-round results from the 22nd annual O'Reilly NHRA Spring Nationals presented by Pennzoil at Houston Raceway Park, the fourth of 24 events in the NHRA Full Throttle Drag Racing Series:

TOP FUEL:

ROUND ONE -- Cory McClenathan, 3.873, 311.27 def. Shawn Langdon, 10.272, 71.86; Larry Dixon, 3.856,313.44 def. Urs Erbacher, 4.072, 224.85; Clay Millican, 3.893, 307.23 def. Troy Buff, 5.893, 103.52; Antron Brown, 3.840, 313.88 def. Todd Simpson, broke; Brandon Bernstein, 3.887, 315.49 def. Terry Haddock, 3.958, 304.05; Tony Schumacher, 3.897, 308.78 def. Del Cox Jr, 3.974, 300.80; Morgan Lucas, 4.636, 220.69 def. David Baca, 6.799, 88.03; Joe Hartley, 4.004, 303.43 def. Spencer Massey, 5.274, 138.37;

QUARTERFINALS -- Schumacher, 4.434, 230.37 def. Lucas, 4.434, 230.37; Hartley, 4.083, 294.31 def. Millican, 5.142, 152.07; Dixon, 4.400, 248.43 def. Bernstein, 5.072, 165.17; McClenathan, 3.909, 303.23 def. Brown, 3.883, 310.63;

SEMIFINALS -- Schumacher, 3.895, 310.91 def. Dixon, 3.889, 307.02; McClenathan, 3.985, 296.70 def. Hartley, 5.082, 150.18;

FINAL -- Schumacher, 3.881, 314.75 def. McClenathan, 3.880, 313.66.

 
FUNNY CAR:

ROUND ONE -- Tim Wilkerson, Ford Mustang, 4.437, 230.37 def. Jeff Arend, Toyota Solara, 4.498, 211.13; Del Worsham, Solara, 4.087, 308.64 def. Jerry Toliver, Chevy Monte Carlo, 4.321, 232.55; Ashley Force Hood, Mustang, 4.640, 201.82 def. Ron Capps, Dodge Charger, 5.148, 188.91; Cruz Pedregon, Solara, 4.834, 250.64 def. Bob Bode, Chevy Impala SS, 4.898, 170.92; Jack Beckman, Charger, 4.954, 246.80 def. Robert Hight, Mustang, 5.353, 144.78; John Force, Mustang, 4.168, 298.21 def. Bob Tasca III, Mustang, 5.914, 118.95; Matt Hagan, Charger, 4.182, 286.86 def. Gary Densham, Dodge Stratus, 9.786, 99.66; Tony Pedregon, Impala, 4.161, 302.55 def. Mike Neff, Mustang, 5.409, 140.99;

QUARTERFINALS -- Beckman, 4.172, 298.01 def. Wilkerson, 4.148, 303.91; T. Pedregon, 4.177, 296.05 def. C. Pedregon, foul; Worsham, 4.867, 209.23 def. Hagan, 5.933, 124.43; Force Hood, 4.454, 240.51 def. Force, 7.380, 70.40;

SEMIFINALS -- Beckman, 4.171, 298.34 def. T. Pedregon, 4.279, 266.37; Force Hood, 4.173, 303.23 def. Worsham, 4.791, 192.66;

FINAL -- Force Hood, 4.122, 306.19 def. Beckman, 4.227, 303.43.

PRO STOCK: 

ROUND ONE -- Ron Krisher, Chevy Cobalt, 6.589, 210.37 def. Allen Johnson, Dodge Stratus, 6.689, 209.98; Jim Yates, Pontiac GXP, 6.607, 209.39 def. Johnny Gray, Stratus, 7.442, 150.58; Jeg Coughlin, Cobalt, 6.614, 209.85 def. David Beckley, Stratus, 6.602, 209.62; Larry Morgan, Stratus, 6.598, 209.98 def. Kurt Johnson, Cobalt, 6.592, 210.54; Steve Spiess, Cobalt, 6.594, 209.62 def.Greg Anderson, GXP, 6.554, 211.99; Mike Edwards, GXP, 6.565, 211.36 def. Rickie Jones, Stratus, 6.591, 210.14; Jason Line, GXP, 6.549, 211.20 def. Tom Hammonds, Cobalt, foul; Warren Johnson, GXP, 6.601, 210.77 def. Justin Humphreys, GXP, 6.614, 208.94;

QUARTERFINALS -- Yates, 6.619, 209.69 def. Morgan, 6.751, 208.94; Coughlin, 6.591, 209.72 def. Spiess, 6.606, 209.65; Edwards, 6.565, 211.76 def. W. Johnson, 6.649, 210.73; Krisher, 6.567, 210.73 def. Line, 6.573, 210.83;

SEMIFINALS -- Coughlin, 6.595, 209.52 def. Yates, 6.616, 209.85; Krisher, 6.573, 210.44 def. Edwards, 6.576, 212.03;

FINAL -- Krisher, 6.587, 211.00 def. Coughlin, 7.051, 165.94.

PRO STOCK MOTORCYCLE:

ROUND ONE -- Steve Johnson, Suzuki, 6.987, 190.16 def. Wes Wells, Suzuki, 13.663, 55.04; Matt Guidera, Buell, 6.978, 188.02 def. Michael Phillips, Suzuki, 6.988, 192.44; Douglas Horne, 6.945, 189.28 def. David Hope, Buell, 7.123, 187.11; Craig Treble, Suzuki, 6.885, 192.33 def. Mike Berry, Buell, 7.123, 181.67; Hector Arana, 6.949, 191.54 def. Karen Stoffer, Suzuki, foul; Andrew Hines, Harley-Davidson, 6.946, 186.61 def. LE Tonglet, Suzuki, 7.204, 185.77; Eddie Krawiec, Harley-Davidson, 7.809, 122.73 def. Shawn Gann, Buell, foul; Matt Smith, Suzuki, 6.893, 192.36 def. Junior Pippin, Buell, 7.063, 186.77;

QUARTERFINALS -- Hines, 6.934, 189.58 def. Johnson, 7.011, 190.75; Horne, 7.026, 187.76 def. Arana, foul; Smith, 6.865, 193.16 def. Krawiec, 6.932, 191.00; Treble, 6.915, 192.71 def. Guidera, 6.976, 189.26;

SEMIFINALS -- Horne, 7.049, 186.56 def. Hines, foul; Treble, 6.912, 193.54 def. Smith, 6.917, 179.68;

FINAL -- Treble, 6.915, 193.46 def. Horne, 7.260, 155.60.