Roupp was optioned to Triple-A Sacramento on Sunday.
Roupp (0-1) took the loss against the Brewers on Tuesday, allowing two runs on five hits while striking out three over five innings.
Roupp will start Tuesday's game against the Brewers, Shayna Rubin of the San Francisco Chronicle reports.
Roupp allowed a hit and two walks while striking out five over four scoreless innings of relief in Thursday's 3-2 win over the Diamondbacks.
The Giants recalled Roupp from Triple-A Sacramento on Tuesday.
The Giants optioned Roupp to Triple-A Sacramento on Saturday.
The Giants recalled Roupp from Triple-A Sacramento on Friday, Maria I. Guardado of MLB.com reports.
Roupp worked 2.2 innings out of the bullpen in Sunday's 10-4 win over the Dodgers, giving up three earned runs on three hits and two walks while striking out three.
Roupp (undisclosed) was recalled from Triple-A Sacramento on Sunday, Susan Slusser of the San Francisco Chronicle reports.
Roupp (undisclosed) made his third rehab appearance in the rookie-level Arizona Complex League on Wednesday, striking out four over two perfect innings.