KANSAS CITY -- Outfielder Jarrod Dyson has a lat strain in his right throwing shoulder which will limit his playing time for the Royals.
"He's going to be shut down for a while throwing-wise, but it doesn't affect his legs," manager Ned Yost said.
Dyson underwent an MRI on Friday after experiencing soreness in his shoulder for the last few days. He believes it might have originated in his spectacular catch against the center-field-wall on Monday at Boston's Fenway Park.
"The next day and Tuesday, I felt a little tightness but Wednesday I really felt it," Dyson said. "It's day to day right now. I'm still available to run or whatever, I'm just shut down throwing right now."
Yost said Dyson can still hit, run and field, so he could be used off the bench.
"You're going to see '@mrzoombiya' [Dyson's twitter handle] back in his old job, pinch-running," Dyson said.
Major League rosters can be expanded on Saturday, so Dyson won't go on the disabled list. Instead, another outfielder will be called up from the Minors.
Club officials indicated it will not be top prospect Wil Myers, who is expected to have a key role in Omaha's postseason play. Nor is Myers on the 40-man roster, a qualification that makes Triple-A outfielder David Lough, now in his third season with Omaha, a logical choice for a callup.
The Royals also are expected to add a third catcher as well. More callups are possible when Omaha's season is over, which could last until the middle of September.