Baltimore Orioles pitching prospect Grayson Rodriguez out because of strained lat muscle 6:09 PM ET ESPN News Services BALTIMORE -- Baltimore Orioles pitching prospect Grayson Rodriguez has a strained lat muscle, general manager Mike Elias said Thursday. It's not clear how long the right-hander will be out. Elias said Rodriguez came to Baltimore for an MRI, which confirmed the strain. Rodriguez, who was ranked No. 8 among the top 100 MLB prospects by ESPN's Kiley McDaniel before the season, seemed on the verge of reaching the majors soon, but he left Wednesday's start for Triple-A Norfolk with discomfort in the lat area. The 22-year-old Rodriguez is 5-1 with a 2.09 ERA in 11 starts for Norfolk this season. He's a big part of Baltimore's rebuild, along with catcher Adley Rutschman , who was recently promoted to the majors . The Associated Press contributed to this report.