N.L. reports. (Baseball).

ARIZONA DIAMONDBACKS Rookie RHP Brandon Webb will take the place of ace LHP Randy Johnson in the rotation for at least a month. With considerable poise and a "power sinker," Webb has allowed one run in 15 innings during three games. Webb struck out 10 Mets in seven shutout innings and put up seven strong innings against the Braves. SCOUTING REPORT: RHP Matt Mantei, back in the closer's role, has established a good curve that goes with his 98-mph heat. He still mainly relies on the fastball but got a number of called third strikes by dropping in the curve. More of a closed landing on his delivery--his left foot straight ahead--helped him recover from elbow Ligament ...