Seattle starter Felix Hernandez improved to 12-4 with a 2.54 ERA in 21 career starts against Oakland, including five consecutive winning decisions.
The Athletics come out of the All-Star break with the third-worst record in the American League at 39-53 and are 12 games behind Texas in the AL West after being swept by the Rangers in a four-game series.
Both teams were still dealing with the aftermath of the death of the fan from a 20-foot fall in the second inning of Thursday night’s game.
Guillermo Moscoso allowed two hits in seven innings and Scott Sizemore homered to help the Athletics salvage the finale of a three-game series with a 2-0 victory over the Mariners on Wednesday.
Scott Sizemore hit a go-ahead three-run double in the ninth inning to rally the Oakland Athletics past the Chicago White Sox 7-5 Friday night, ending a 10-game losing streak.
The Oakland Athletics activated infielder Adam Rosales from the 60-day disabled list Monday and recalled infielder Scott Sizemore from Triple-A Sacramento.
The Detroit Tigers traded second baseman Scott Sizemore to the Oakland Athletics for left-handed reliever David Purcey on Friday.