The Orioles optioned Vespi to Triple-A Norfolk on Friday, Jake Rill of MLB.com reports.
Rill notes that this is the fifth time Vespi has been optioned this season, which is the maximum number allowed before he has to pass through waivers should the O's want to call him up and send him down again. The southpaw has posted a 2.92 ERA and 9:3 K:BB across 12.1 innings during his multiple stints this year in the big leagues.