Orioles left-hander Trevor Rogers isn't expected to be ready for the start of the season after a partial dislocation of his right kneecap during the offseason.

The Opening Day roster for the Orioles isn’t going to include infielder Jorge Mateo. The fastest player in camp made a speedy exit from it.On the first workout day, executive vice president/general manager Mike Elias confirmed that Mateo is making progress but probably won’t get enough at-bats to be ready on March 27 in Toronto.

Orioles left-hander Trevor Rogers sustained a partial dislocation of his right kneecap during the offseason, Baltimore GM Mike Elias said Thursday.