Second baseman Brian Roberts is diving for balls in the infield as he continues to make steady progress in his recovery from multiple concussions. “The trainers are treating a pretty good strawberry from sliding,” Showalter said. “That’s a good sign.” … Robert Andino was back in the leadoff spot on Tuesday night, and Xavier Avery hit ninth against CC Sabathia. ... The Orioles removed left-hander Dontrelle Willis from the restricted list and assigned him to short-season Single-A Aberdeen, according to Triple-A Norfolk’s Twitter account. ... Double-A Bowie placed outfielder Ronnie Welty, the Orioles’ Minor League Player of the Month for April, on the disabled list. Welty had batted .291 with six RBIs, one homer and seven doubles in 14 games for the Baysox.