Officials at Beth Israel Deaconess Medical Center said Thursday that Tonya Carpenter's condition has improved. They didn't provide other details.
The 44-year-old resident of Paxton, Massachusetts, suffered what police initially said were life-threatening injuries during the June 5 game between the Boston Red Sox and Oakland Athletics.
She was struck in the head in the second inning when the bat of Oakland's Brett Lawrie broke and sailed into the seats along the third-base line when he hit a ground ball.
The incident has prompted Major League Baseball to re-evaluate fan safety at stadiums.
Carpenter's family said in a statement Monday that she was responsive and improving.
MLB to examine fan safety after Fenway accident
Jayson Stark discusses commissioner Rob Manfred's comments that Major League Baseball will re-evaluate fan safety after an injury Friday at Fenway Park.