Medlen did throw a simulated game on Thursday.
Orlando to get start
Yost also indicated on Friday that Paulo Orlando, last season's rookie surprise, likely will get his first start of the season in right field on Saturday against Twins left-hander Tommy Milone. Yost has started rookie Reymond Fuentes the first three games in right field.
Dyson to rehab
And, as expected, outfielder Jarrod Dyson (strained oblique) will start his rehab assignment at Triple-A Omaha on Saturday.
"I don't know how much time he'll need," Yost said. "But he was swinging the bat pretty well here the last couple days in BP."
Jeffrey Flanagan is a reporter for MLB.com. Follow him on Twitter at @FlannyMLB. This story was not subject to the approval of Major League Baseball or its clubs.