New York Mets (48-34, first in the NL East) vs. Pittsburgh Pirates (32-50, fifth in the NL Central) Pittsburgh; Friday, 6:40 p.m. EDT PITCHING PROBABLES: Mets: David Peterson (5-3, 2.98 ERA, 1.24 WHIP, 78 strikeouts); Pirates: Mitch Keller (1-10, 4.02 ERA, 1.22 WHIP, 73 strikeouts) BETMGM SPORTSBOOK LINE: Mets -161, Pirates +134; over/under is 8 1/2 runs BOTTOM LINE: The Pittsburgh Pirates open a three-game series at home against the New York Mets on Friday. Pittsburgh has a 32-50 record overall and a 20-21 record in home games. Pirates pitchers have a collective 3.87 ERA, which ranks ninth in the NL. New York has gone 19-22 in road games and 48-34 overall. The Mets have gone 36-10 in games when