San Francisco Giants (45-40, third in the NL West) vs. Arizona Diamondbacks (42-42, fourth in the NL West) Phoenix; Tuesday, 9:40 p.m. EDT PITCHING PROBABLES: Giants: Hayden Birdsong (3-2, 4.13 ERA, 1.38 WHIP, 56 strikeouts); Diamondbacks: Zac Gallen (5-9, 5.75 ERA, 1.41 WHIP, 88 strikeouts) BETMGM SPORTSBOOK LINE: Diamondbacks -137, Giants +115; over/under is 9 runs BOTTOM LINE: The San Francisco Giants hit the road against the Arizona Diamondbacks looking to break a three-game road skid. Arizona is 42-42 overall and 21-21 at home. Diamondbacks hitters are batting a collective .254, the sixth-best team batting average in MLB play. San Francisco has a 20-23 record on the road and a 45-40 record