Cubs optioned RHP Tyler Ferguson to Triple-A Iowa.
He had only been acquired from the A’s in early May and was only active in the majors for a brief spell here. Ferguson allowed four earned runs in his only appearance in the bigs this year with the Athletics, and has a combined 5.12 ERA in 19 1/3 innings with Triple-A Las Vegas and Iowa, though it has been lower in Iowa at 3.52.