The Cincinnati Reds placed rookie right-hander Hunter Greene on the 15-day injured list with a right shoulder strain.
The designation, announced Friday night, is retroactive to Tuesday. Greene turned 23 on Saturday.
The Reds recalled right-hander Ryan Hendrix from Triple-A Louisville in a corresponding transaction.
Greene is 4-12 with a 5.26 ERA in 20 starts this season. He has 127 strikeouts in 102 2/3 innings.
Greene, the No. 2 overall pick in the 2017 draft, limited the Miami Marlins to one hit and struck out eight in six scoreless innings in a 3-1 win on Monday.
Hendrix, 27, has no decisions and a 4.26 ERA in seven relief appearances this season for the Reds.
--Field Level Media