CINCINNATI -- The Reds have placed rookie starting pitcher Tim Adleman on the 15-day disabled list following a grade-one external strain to his left oblique, suffered in the fourth inning of Thursday's series finale against the Indians.
"Initial optimism is we got everything early and identified the injury and started treatment on it, possibly two weeks," manager Bryan Price said. "From an oblique standpoint, that's a best-case scenario."
To replace him on the roster, Cincinnati called up 26-year-old outfielder Steve Selsky from Triple-A Louisville.
At this point, Price has not revealed who the Reds will use to replace Adleman's next start, which was scheduled to take place Tuesday against the Dodgers.

"[Selsky will] help us as an early game bench bat," Price said. "Then we'll see. We'll see how things shape up with the rotation moving forward."
Selsky made his Reds debut Friday night as a pinch-hitter for starter Dan Straily in the sixth. He struck out looking in a four-pitch at bat against Hisashi Iwakuma.
A 33rd-round pick by the Reds in 2011, Selsky is hitting .275 for Louisville with one home run and 10 doubles over 120 at bats. To make room for Selsky on the 40-man roster, the Reds designated Louisville reliever Drew Hayes for assignment, who has cleared waivers.
"We talk about that all the time, timing, right place right time," Selsky said. "I was just fortunate enough to be in this situation and put myself in a good situation to have things work out."
Adleman's injury makes the sixth starter currently on the disabled list for Cincinnati with Michael Lorenzen, Homer Bailey, Jon Moscot, Raisel Iglesias and Anthony DeSclafani all on the shelf.
Given the beleaguered nature of the rotation and the struggles of the bullpen, Adleman's injury couldn't have come at a worse time for the Reds' pitching staff.
"It's frustrating to have an in-game situation like that where you put the team and the bullpen in a tough spot," Adleman said. "It's something that's completely out of your control. Obviously, you never plan to come out of a game like that. It's difficult, but it is what it is."
Before the injury, Adleman was 1-1 with a 3.73 ERA and 16 strikeouts over 19 1/3 innings. While the team has not given him a time frame on throwing, he believes that he may be able to try to play catch within the next few days.
"I presume that they'll want to give it a few days with no activity, no throwing and then hopefully get out there around the end of this homestand or the beginning of the road trip and play some catch and just kind of see how it feels and go from there," Adleman said.