Pirates host the Giants to start 3-game series

San Francisco Giants (23-25, third in the NL West) vs. Pittsburgh Pirates (22-26, third in the NL Central) Pittsburgh; Tuesday, 6:40 p.m. EDT PITCHING PROBABLES: Giants: Logan Webb (4-4, 3.03 ERA, 1.35 WHIP, 47 strikeouts); Pirates: Martin Perez (1-3, 4.86 ERA, 1.50 WHIP, 40 strikeouts) : LINE Giants -135, Pirates +114; over/under is 7 1/2 runs BOTTOM LINE: The Pittsburgh Pirates host the San Francisco Giants on Tuesday to begin a three-game series. Pittsburgh is 22-26 overall and 9-12 in home games. The Pirates are 15-1 in games when they scored at least five runs. San Francisco has a 23-25 record overall and an 8-15 record in road games. Giants hitters are batting a collective .247, which ranks