Diamondbacks visit the Mariners to begin 3-game series

Arizona Diamondbacks (12-14, third in the NL West) vs. Seattle Mariners (13-12, first in the AL West)Seattle; Friday, 9:40 p.m. EDTPITCHING PROBABLES: Diamondbacks: Zac Gallen (3-1, 3.00 ERA, 1.30 WHIP, 32 strikeouts); Mariners: Emerson Hancock (2-2, 6.10 ERA, 1.26 WHIP, 15 strikeouts)BETMGM SPORTSBOOK: LINE Diamondbacks -133, Mariners +112; over/under is 7 1/2 runsBOTTOM LINE: The Seattle Mariners host the Arizona Diamondbacks to begin a three-game series.Seattle has a 13-12 record overall and