Vespi was optioned to Triple-A Norfolk on Thursday, Roch Kubatko of MASNSports.com reports.
Vespi will return to Norfolk after he appeared in two games following a call-up Monday. The left-hander tossed three scoreless innings, allowing two hits and a walk while striking out six. Beau Sulser and Logan Gillaspie were called up Thursday to replace him and Tyler Wells (side) on the active roster. Vespi will remain a top candidate to return to the big leagues moving forward.