Chase Silseth threw six scoreless innings in his major league debut, leading the Los Angeles Angels to a 2-0 victory over the host Oakland A's on Friday night.

Silseth, 21, was called up from Double-A Rocket City with the Angels in need of an extra starter ahead of a Saturday doubleheader. An 11th-round draft pick out of the University of Arizona last year, Silseth (1-0) allowed only one hit -- a third-inning single by Elvis Andrus.

He walked two and struck out four while making 81 pitches before handing the ball over the Angels' bullpen, which completed the shutout. Aaron Loup (seventh inning), Ryan Tepera (eighth) and Raisel Iglesias (ninth inning, eighth save) each threw a scoreless inning and finished a two-hitter.

A's starter Daulton Jefferies (1-6) also went six strong innings, but he allowed an RBI single to Brandon Marsh and a solo homer to Andrew Velazquez, and that was enough for Los Angeles.

Both teams threatened to score in the third inning but came up empty. The Angels put runners on first and second for Mike Trout, but Jefferies got Trout to ground into an inning-ending force play.

In the bottom of the inning, the A's put runners on first and second with one out against Silseth before Jed Lowrie hit a flyball to medium-deep left field, where Marsh made the catch. Andrus tagged from second and tried to advance, but Marsh made a perfect throw to Anthony Rendon at third to cut down Andrus and end the inning.

The Angels broke through in the fourth inning after Rendon doubled with one out. One out later, Marsh hit a grounder up the middle that the A's shortstop Andrus got a glove on, the ball trickling into shallow center and allowing Rendon to score without a throw.

The Angels added to their lead with one out in the fifth. Velazquez bashed the first pitch of the at-bat for his second career major league homer, his first of the year.

Jefferies retired the next five Angels hitters in a row to end his outing. He gave up two runs on five hits and no walks while striking out four.

The Athletics' final hit was a two-out single by Andrus off Tepera in the eighth.