Collection of updates on Blue Rocks
• The Nationals’ High-A Blue Rocks’ best hitter right now is probably Omar Meregildo, a thick-bodied first baseman who has some real power, but he’s repeating the level and is 24 years old, way too old for A-ball. Among their pitchers, Seth Shuman — part of the deal that sent Yan Gomes and Josh Harrison to Oakland last July — showed a fastball that missed a lot of bats up top of the zone even at 91-92, but his four walks in five innings were his highest single-game total of the year. He doesn’t have a plus pitch, so if his command is there, he could be a swingman. Reliever Jose Ferrer, a left-hander making his full-season debut this year, was 94-95, bumping 98 once, with a very hard slider at 86-91. He was erratic but didn’t allow a baserunner in two innings. Reliever prospects are imaginary creatures but he’s got a chance.