Astros righthander Felipe Paulino flew back to Houston to have his arm examined after feeling pain in his upper right arm.
"Any time you hear one of your starting pitching candidates has an arm issue, you are concerned enough to fly him back to Houston," general manager Ed Wade said.
In his last outing Saturday, Paulino allowed five runs in three innings against Washington.
Paulino told athletic trainer Dave Labossiere he has been experiencing discomfort in his arm for some time, Wade said.
"I wish he would have spoken up a little sooner," Wade said. "But we’ll go ahead and get it addressed and hopefully have it be something minor."
With a fastball that touches triple digits, Paulino had 110 strikeouts in 112 innings last year with (edit: fixed) Double-A Corpus Christi. In a farm system thin on both depth and high-end talent, Paulino ranks as the organization’s top pitching prospect.