Tom Pernice Jr shot a blistering seven-under-par 63 to grab a share of the clubhouse lead at the halfway point of the AT&T National.

MARANA, AZ - FEBRUARY 21: Steve Stricker hits his tee shot on the 17th hole during the second round matches of the WGC-Accenture Match Play Championship at The Gallery at Dove Mountain on February 21, 2008 in Marana, Arizona. (Photo by Scott Halleran/Getty Images)

MARANA, AZ - FEBRUARY 21: Steve Stricker hits to the second green during the second round matches of the WGC-Accenture Match Play Championship at The Gallery at Dove Mountain on February 21, 2008 in Marana, Arizona. (Photo by Scott Halleran/Getty Images)

MARANA, AZ - FEBRUARY 21: Steve Stricker hits his tee shot on the 16th hole during the second round matches of the WGC-Accenture Match Play Championship at The Gallery at Dove Mountain on February 21, 2008 in Marana, Arizona. (Photo by Scott Halleran/Getty Images)

MARANA, AZ - FEBRUARY 21: Steve Stricker watches his tee shot on the 14th hole during the second round matches of the WGC-Accenture Match Play Championship at The Gallery at Dove Mountain on February 21, 2008 in Marana, Arizona. (Photo by Scott Halleran/Getty Images)

MARANA, AZ - FEBRUARY 21: Steve Stricker pitches to the second green during the second round matches of the WGC-Accenture Match Play Championship at The Gallery at Dove Mountain on February 21, 2008 in Marana, Arizona. (Photo by Scott Halleran/Getty Images)

MARANA, AZ - FEBRUARY 20: Steve Stricker hits his second shot on the first hole during the first round matches of the WGC-Accenture Match Play Championship at The Gallery at Dove Mountain on February 20, 2008 in Marana, Arizona. (Photo by Stephen Dunn/Getty Images)

HONOLULU - JANUARY 11: Steve Stricker pulls a club from his bag on the third hole during the second round of the Sony Open at the Waialae Country Club on January 11, 2008 in Honolulu, Oahu, Hawaii. (Photo by Jeff Gross/Getty Images)

ATLANTA - SEPTEMBER 14: Steve Stricker chips on the 15th hole during the second round of the TOUR Championship, the final event of the new PGA TOUR Playoffs for the FedExCup at East Lake Golf Club on September 14, 2007 in Atlanta, Georgia. (Photo by S.Greenwood/Getty Images)

ATLANTA - SEPTEMBER 14: Tiger Woods walks in front of Steve Stricker on the 8th hole during the second round of the TOUR Championship, the final event of the new PGA TOUR Playoffs for the FedExCup at East Lake Golf Club on September 14, 2007 in Atlanta, Georgia. (Photo by Streeter Lecka/Getty Images)

ATLANTA - SEPTEMBER 13: Steve Stricker hits from the bunker on the 3rd hole during the first round of the TOUR Championship at East Lake Golf Club in Atlanta, Georgia on September 13, 2007. (Photo by Sam Greenwood/Getty Images)

ATLANTA - SEPTEMBER 13: Steve Stricker tees off on the 8th hole during the first round of the TOUR Championship at East Lake Golf Club in Atlanta, Georgia on September 13, 2007. (Photo by Sam Greenwood/Getty Images)

LEMONT, IL - SEPTEMBER 09: Steve Stricker tees off on the 15th hole during the fourth round of the BMW Championship, the third event of the new PGA TOUR Playoffs for the FedExCup at Cog Hill Golf and Country Club on September 9, 2007 in Lemont, Illinois. (Photo by Sam Greenwood/Getty Images)

LEMONT, IL - SEPTEMBER 09: Steve Stricker plays the 13th hole during the fourth round of the BMW Championship, the third event of the new PGA TOUR Playoffs for the FedExCup at Cog Hill Golf and Country Club on September 9, 2007 in Lemont, Illinois. (Photo by Sam Greenwood/Getty Images)

LEMONT, IL - SEPTEMBER 09: Steve Stricker lines up a putt on the 10th hole during the fourth round of the BMW Championship, the third event of the new PGA TOUR Playoffs for the FedExCup at Cog Hill Golf and Country Club on September 9, 2007 in Lemont, Illinois. (Photo by Sam Greenwood/Getty Images)

LEMONT, IL - SEPTEMBER 8: Steve Stricker acknowledges the gallery after making a birdie putt on the 18th hole during the third round of BMW Championship, the third event of the new PGA TOUR Playoffs for the FedExCup at Cog Hill Golf and Country Club September 8, 2007 in Lemont, Illinois. (Photo by Jeff Gross/Getty Images)

LEMONT, IL - SEPTEMBER 8: Steve Stricker watches his second shot from the 17th fairway during the third round of BMW Championship, the third event of the new PGA TOUR Playoffs for the FedExCup at Cog Hill Golf and Country Club September 8, 2007 in Lemont, Illinois. (Photo by Jeff Gross/Getty Images)

LEMONT, IL - SEPTEMBER 8: Steve Stricker tees off on the third hole during the third round of the BMW Championship, the third event of the new PGA TOUR Playoffs for the FedExCup at Cog Hill Golf and Country Club September 8, 2007 in Lemont, Illinois. (Photo by S. Greenwood/Getty Images)

LEMONT, IL - SEPTEMBER 8: Steve Stricker plays the fourth hole during the third round of the BMW Championship, the third event of the new PGA TOUR Playoffs for the FedExCup at Cog Hill Golf and Country Club September 8, 2007 in Lemont, Illinois. (Photo by S. Greenwood/Getty Images)

LEMONT, IL - SEPTEMBER 8: Steve Stricker marks his ball during the third round of the BMW Championship, the third event of the new PGA TOUR Playoffs for the FedExCup at Cog Hill Golf and Country Club September 8, 2007 in Lemont, Illinois. (Photo by S. Greenwood/Getty Images)

LEMONT, IL - SEPTEMBER 6: Steve Stricker hits on the 13th hole during the first round of BMW Championship, the third event of the new PGA TOUR Playoffs for the FedExCup at Cog Hill Golf and Country Club September 6, 2007 in Lemont, Illinois. (Photo by Sam Greenwood/Getty Images)

LEMONT, IL - SEPTEMBER 6: Steve Stricker watches his tee shot on the third hole during the first round of BMW Championship, the third event of the new PGA TOUR Playoffs for the FedExCup at Cog Hill Golf and Country Club September 6, 2007 in Lemont, Illinois. (Photo by Sam Greenwood/Getty Images)

LEMONT, IL - SEPTEMBER 6: Steve Stricker hits out of the bunker on the fifth hole during the first round of BMW Championship, the third event of the new PGA TOUR Playoffs for the FedExCup at Cog Hill Golf and Country Club September 6, 2007 in Lemont, Illinois. (Photo by Sam Greenwood/Getty Images)

NORTON, MA - SEPTEMBER 3: Steve Stricker watches the flight of his shot from the second tee box during the fourth and final round of Deutsche Bank Championship, the second event of the new PGA TOUR Playoffs for the FedExCup at TPC Boston on September 3, 2007 in Norton, Massachusetts. (Photo by J. Rogash/Getty Images)

NORTON, MA - SEPTEMBER 1: Steve Stricker watches his a bunker shot on the ninth hole during the second round of the Deutsche Bank Championship, the second event of the new PGA TOUR Playoffs for the FedexCup at TPC Boston September 1, 2007 in Norton, Massachusetts. (Photo by Scott Halleran/Getty Images)

NORTON, MA - AUGUST 31: Steve Stricker watches a shot on the 14th hole during the first round of the Deutsche Bank Championship, the second event of the new PGA TOUR Playoffs for the FedexCup at TPC Boston on August 31, 2007 in Norton, Massachusetts. (Photo by Scott Halleran/Getty Images)