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Matt Cain

LEADING OFF: Giants host surging Cubs; Strasburg streaking

A look at what's happening all around the major leagues today: ___ LET'S GET WILD The Cubs have won 21 of 26 and can increase their 6 1/2-game cushion in the race for the second NL wild card when they open a three-game series at San Francisco. Jake Arrieta (15-6, 2.30 ERA) pitches for Chicago against Matt Cain (2-3, 5.66). HE Stephen Strasburg looks to continue his dominant stretch as the Nationals, losers in eight of 12, host the Padres. The right-hander has a 1.35 ERA in three starts — all vs. NL West teams — since returning from the disabled list Aug. 8 following an oblique strain. San Diego sends out James Shields (9-5, 3.74), who picked up his first victory...