The Brewers recalled Hall from Triple-A Nashville on Friday, Adam McCalvy of MLB.com reports.
Hall is the designated 27th man for Friday's doubleheader against the Reds and will start the second game. The left-hander made a spot start earlier this month -- his first with the Brewers since April -- and struck out nine while yielding three runs (one earned) over 4.2 innings. Hall is likely to be sent back down immediately following the double dip.