PHOENIX – Richie Sexson hit the longest home run in Bank One Ballpark history and Randy Johnson struck out 10 on Monday night, leading the Arizona Diamondbacks to a 9-0 rout that snapped the Chicago Cubs’ six-game winning streak.

Sexson’s two-run shot off reliever Francis Beltran in the sixth inning traveled an estimated 503 feet and smacked off his own image halfway up the giant video screen in center field, smashing several lights.

It was Sexson’s 200th career home run and ninth this season.

Previously, the longest homer at the seven-year-old park was 473 feet by Scott Rolen, then with Philadelphia, against Omar Daal on April 19, 1999.

Johnson (2-2) improved to 12-0 in 13 career starts against the Cubs, striking out seven straight during one stretch. He pitched two-hit ball for seven innings and had an RBI single as the Diamondbacks won for the fourth time in five games. He walked none.

The Big Unit gave up a single to Cubs starter Carlos Zambrano with one out in the third, then retired 12 straight before Moises Alou singled with one out in the seventh. The only other Cub to reach base against Johnson was Derrek Lee, hit by a pitch with two outs in the second.

Seven consecutive Chicago outs were by strikeout, beginning when Sammy Sosa was caught looking to end the first and ending when Corey Patterson fanned to end the third.

Randy Choate completed Arizona’s second shutout, allowing three hits in two innings.

The Cubs gave up more runs in one game than they did in their entire winning streak, when they outscored opponents 39-5.

Zambrano (2-1) was tagged for seven runs and 10 hits in 4 1-3 innings.

Arizona third baseman Chad Tracy – in his fifth major league game – was 2-for-4 with two RBIs and a double, and made consecutive standout defensive plays in the sixth. He lunged to his left to stab Jose Macias’ line drive, then tumbled headfirst over the fence to catch Patterson’s pop foul.

The Diamondbacks broke through in the third when Tracy led off with a 400-foot double off the center-field wall, then scored on Robby Hammock’s double just inside the right-field line. With two outs, Alex Cintron tripled to the wall in left-center, bringing home Hammock to make it 2-0.

Danny Bautista extended his career-best hitting streak to 18 games with a one-out single in the fourth. He moved to second on Tracy’s groundout. Zambrano intentionally walked Hammock to get to Johnson, who singled down the right-field line on an 0-2 pitch to bring home Bautista. Matt Kata added an RBI single to put Arizona up 4-0.

Notes: Cubs right-hander Mark Prior will have a bullpen session Tuesday, then will remain in Mesa at the team’s spring training facility for more rehabilitation on his inflamed Achilles’ tendon and sore elbow. … Bautista earned his first NL player of the week award after batting .464 (13-for-28) last week with three doubles, three homers and 10 RBIs. … Kata has a career-best eight-game hitting streak.

AP-ES-04-27-04 0029EDT