Arrieta steady over four innings; Fowler, Russell fuel offense

Cubs-A's matchup launches Big League Weekend in Las Vegas

Arrieta steady over four innings; Fowler, Russell fuel offense

LAS VEGAS -- Cubs right-hander Jake Arrieta threw four solid innings in a 5-3 win over the A's on Friday, kicking off Big League Weekend at Cashman Field in Las Vegas.

The A's and Cubs will complete the two-game, split-squad series with a 12:05 p.m. PT matchup Saturday.

Just one unearned run scored under Arrieta's watch. The righty allowed four hits on the night, striking out three and walking none.

Arrieta retires Ladendorf

Teammates Dexter Fowler and Addison Russell notched RBI doubles in a three-run sixth that also included a run-scoring single off the bat of Junior Lake.

A's starter Drew Pomeranz, in the middle of a fierce rotation competition, struck out six in three innings in his second exhibition start, but he also proved inefficient with his pitches, needing 59 total -- with only 35 thrown for strikes.

The lefty retired six of his first seven batters before loading the bases in the third for Anthony Rizzo, whose grounder resulted in two errors on first baseman Matt Olson. The A's prospect bobbled the ball before throwing it away, allowing two runs to score, one unearned.

A's infield prospect Max Muncy collected three hits in the game, bringing home Craig Gentry with an RBI single in the first, doubling in the third and adding a two-run home run in the bottom of the eighth off Donn Roach.

Up next: The split-squad Cubs remain separated by 300 miles on Saturday. Kyle Hendricks starts against the A's in Las Vegas at 2:05 p.m. CT (live on Gameday Audio), and Edwin Jackson gets the ball in Phoenix against the Brewers an hour later (live on MLB.TV and Gameday Audio). For the club remaining in Arizona, Starlin Castro will play short and hit third. He'll be teamed up with double-play partner Arismendy Alcantara, who will play second and hit second.

Jane Lee is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.