MINNEAPOLIS -- Reliever Sam Dyson hasn't gotten off to the smoothest start for his new team after his acquisition by the Twins at the Trade Deadline, and he'll have to wait a while longer to make his impact felt after he was placed on the 10-day injured list on Sunday with right biceps tendinitis.

In a corresponding move, Devin Smeltzer was recalled from Triple-A Rochester to make Sunday's start against the Royals, pushing Jake Odorizzi and the Twins' regular rotation order back a day. Smeltzer tossed six-plus scoreless innings, holding the Royals to two hits and a walk while fanning four to earn his first Major League win in the Twins' 3-0 victory at Target Field.

Dyson said that the issue first flared up as a member of the Giants in mid-July during a road trip to Colorado. He pitched through it until he informed general manager Thad Levine several days ago, and the issue was brought to manager Rocco Baldelli's attention following Dyson's outing on Friday against the Royals. Dyson allowed the Twins to choose the course of action, and they opted to give him rest to get him healthy for the stretch run.

"I was just grinding through it the whole time and I didn't want to put these guys in a bad spot because they're in first place," Dyson said.

Imaging on the area did not reveal any serious damage, and both Baldelli and chief baseball officer Derek Falvey expect the issue to keep Dyson off the field for days, not weeks, as the right-hander shouldn't need much more time than the minimum 10 days on the IL. Dyson expects to spend several days resting before potentially starting work on his shoulder Wednesday or Thursday.

"I think we're doing the right thing here," Baldelli said. "We're addressing the issue. Like I said, he's a guy that will continue to pitch and will say, 'Give me the ball.' Again, someone has to kind of step up here, and our medical staff is going to step up here and just say that we need to make sure that he's in a better spot to be out there pitching before we get him back out there."

Dyson had a 2.47 ERA in 51 innings for the Giants this season prior to the trade, but was tagged for six runs while recording only two outs in his first two appearances for the Twins. He allowed three runs without recording an out Thursday in Miami, an eventual Twins loss in extra innings, and allowed three more runs on Friday night against the Royals.

"You can look at the outings as a whole and also know him as a pitcher and what he does, and they didn't match up perfectly," Baldelli said. "The thing is, Sam doesn't make any excuses. We've seen that and it's very clear that he wants the ball and he wants to go out there and compete for his team and for himself."

Of course, questions about the medical considerations of a trade can arise when an acquisition like Dyson is immediately sidelined with injury following his arrival to a new team.

While Falvey acknowledged that there was "definitely some surprise" stemming from the injury, he said the Twins felt good about their medical review of Dyson when they traded for him, and Falvey chalked up the injury more to the standard maintenance needed by most pitchers throughout the course of a season.

"He didn't have any open injuries, and from our medical review and otherwise, we felt good about where he was," Falvey said. "This is something that has probably popped up for him more recently, and I'm not saying just the days he's been with us, but something that he had to work through. Now, our focus is just trying to get him as healthy as possible."