Riley Greene homered in a six-run first inning as the Detroit Tigers defeated the host Seattle Mariners 9-6 on Monday night for their first victory of the season.Dillon Dingler, Trey Sweeney and Javier Baez, the bottom three batters in Detroit’s lineup, each went 3-for-5 to contribute to an 18-hit attack.Tyler Holton (1-0) got the victory in relief of top prospect Jackson Jobe, who made his first major-league start.Jobe, the No. 3 overall selection in the 2021 MLB Draft, allowed three runs on three hits – two of them solo homers – over four innings, with three strikeouts. The right-hander didn’t last the required five innings to earn the victory as four walks led him to throw 79 pitches.Mariners right-hander Emerson Hancock (0-1), the No. 6 overall pick in 2020, didn’t make it out of the first. He allowed six runs on seven hits in two-thirds of an inning, with one walk and no strikeouts, to put his ERA at 81.00.Detroit’s Justyn-Henry Malloy led off the game with a double to right field and scored on Kerry Carpenter line-drive single to right. After Carpenter was thrown out trying to steal second, Greene launched a 3-2 sinker on the outside corner over the left field wall. Spencer Torkelson reached on an infield single and Colt Keith walked before Zach McKinstry flied out to left.Dingler blooped a two-out single into shallow left field to make it 3-0 and Sweeney hit a looping liner just over leaping shortstop J.P. Crawford to drive in another run. Baez lined a two-run double off the base of the wall in left to make it 6-0 and end Hancock’s night.Seattle’s Randy Arozarena led off the second with a homer to left-center.The Tigers got that run back in the third on Carpenter’s two-out double to center.The Mariners scored in the bottom of the inning as Crawford walked, Victor Robles doubled