TAMPA, Fla. — Yankees manager Aaron Boone sounded worried last Friday when he announced right-hander Luis Gil stopped a bullpen due to tightness in his pitching shoulder.

New York Yankees pitcher Luis Gil will miss the opening weeks of the regular season and possibly longer with a high-grade lat strain. Manager Aaron Boone told reporters on Monday that Gil will be shut down from throwing for the next six weeks after an MRI revealed the injury.

Yankees right-hander Luis Gil, who cut short a scheduled bullpen session last week due to discomfort near his right shoulder, was diagnosed with a high-grade right lat strain and will not throw for at least six weeks,