BALTIMORE -AP- Addison Russell hit a go-ahead solo home run in the ninth inning and the Chicago Cubs beat the Baltimore Orioles 9-8 after squandering an eight-run lead on Friday night.Mark Trumbo tied the game 8-8 with a two-run homer off Koji Uehara (3-4) in the eighth. Russell responded when he hit a first-pitch, 96 mph fastball off Brad Brach (2-2) over the left field fence.Wade Davis picked up his 17th save for Chicago. Willson Contreras and Kyle Schwarber hit back-to-back homers in a four-run first inning for Chicago. Ben Zobrist also homered onto the flag court behind the right field scoreboard and Jason Heyward reached Eutaw Street with another towering shot.Chicago improved to 3-6 in interleague play after going 15-5 against the AL last season.Welington Castillo's ninth home run was a solo shot in the third for Baltimore, which left 10 runners on base.Contreras provided a 3-0 lead with a homer into the Cubs' bullpen. Schwarber hammered Kevin Gausman's next pitch to almost the exact spot.Zobrist and Heyward hit two-run homers in the second and third, respectively, to boost the margin to 8-0. Gausman tied a career-high by allowing eight runs and seven hits over three innings. He also gave up four home runs -- the most of his career.Mark Trumbo, Trey Mancini and Joey Rickard had RBI singles in the fifth off reliever Justin Grimm to cut the lead to 8-6.MOVESCubs: To make room for LHP Jose Quintana, who was acquired from the White Sox on Thursday, RHP Dylan Floro was optioned to Triple-A Iowa.Orioles: OF Craig Gentry cleared waivers and was assigned to Triple-A Norfolk.