Olson was recalled by the A's on Saturday, Susan Slusser of the San Francisco Chronicle reports.
The young outfielder was expected to be down at Triple-A until at least mid June after being optioned earlier in the week, but an injury to Andrew Triggs allowed him to come back up to the big-league club. Olson went 1-for-3 in his earlier stint with the A's and he has a .286/.376/.582 slash line with 15 home runs at Triple-A Nashville this season. He will not be in Saturday's lineup but he could be available off the bench.