Negrych suffered the hematoma -- defined as a collection of blood, usually clotted, in a tissue or organ, caused by a break in a blood vessel -- during a collision with shortstop Brian Friday on Monday. The Altoona middle infielders were converging on a ground ball when they struck each other.
The location of the hematoma and surgery was Negrych's abdomen, Pirates director of player development Kyle Stark confirmed. According to Stark, Negrych is not expected to deal with any long-term effects from the incident. The organization is refraining from commenting on Negrych's return to the field for the time being and instead focusing on solely on his health.
Negrych, who was the Pirates' Minor League Player of the Year in 2008, was hitting .272 with 18 doubles, three homers and 30 RBIs in 93 games for Altoona. He was batting .310 during the month of July.
Negrych released a short statement through Altoona's media relations department Tuesday saying, "The people in Altoona have been unbelievable towards me and I'm very grateful of them."
Jenifer Langosch is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.