The Brewers recalled Hall from Triple-A Nashville on Sunday.
Hall rejoined the Brewers in short order after he was briefly returned to the minors following his spot start in the second game of Friday's doubleheader with the Reds. Since he tossed seven scoreless innings for Milwaukee in the 14-0 win, Hall presumably won't be available for another couple of days, but once he's recovered from Friday's start, he'll likely operate as a multi-inning option out of the bullpen. Milwaukee has a pair of off days coming up Thursday and Sept. 9, but with the club finishing the regular season with a stretch of 19 games in 20 days, it's possible that Hall picks up some starts as part of a six-man rotation.