Seattle Mariners (37-36, second in the AL West) vs. Chicago Cubs (45-29, first in the NL Central) Chicago; Friday, 2:20 p.m. EDT PITCHING PROBABLES: Mariners: George Kirby (1-3, 5.96 ERA, 1.36 WHIP, 30 strikeouts); Cubs: Matthew Boyd (6-3, 2.79 ERA, 1.17 WHIP, 73 strikeouts) BETMGM SPORTSBOOK LINE: Cubs -129, Mariners +109; over/under is 9 1/2 runs BOTTOM LINE: The Chicago Cubs host the Seattle Mariners to open a three-game series. Chicago has a 24-13 record in home games and a 45-29 record overall. The Cubs rank fifth in MLB play with 102 total home runs, averaging 1.4 per game. Seattle has gone 17-17 in road games and 37-36 overall. The Mariners have a 17-9 record in games when they hit at