"Ever since he got hit, he hasn't been as good on that hand," Mattingly said of Uribe, who was hit by a 91-mph fastball from Cubs right-hander Carlos Zambrano last Wednesday.
Since then, Uribe is 0-for-14 with seven strikeouts. Prior to getting hit, Uribe was 0-for-3 with two strikeouts for a combined 0-for-17 and nine strikeouts, taking his batting average from .245 to .213.
"He's just struggled," said Mattingly. "He looks sound mechanically. I don't worry about him. I really think he's going to hit. Sometimes it's matchups. He'll run into a guy he doesn't match up with. Then he'll see guys he matches up good with. He seems a little out of sync. Sometimes a change of scenery in a new series can change what's going on."
Uribe appeared to be heating up in mid-April when he went 9-for-20 through a five-game stretch, only to strain a quad muscle and miss three games.