Selman was recalled from Triple-A Las Vegas on Sunday, Matt Kawahara of the San Francisco Chronicle reports.
The 31-year-old had a five-day stint in the majors for Oakland in April, and he's spent the past month-plus at Triple-A. Selman has a 1.98 ERA, 1.36 WHIP and 18:9 K:BB over 13.2 innings for Las Vegas this year and will now receive another chance in the big leagues.