As criticism mounts over the National Football League’s failure to do enough to prevent repeat head injuries and their lasting cognitive effects, the NFL was expected to announce Monday that the league would convert to an electronic health record system next season with software provided by Westborough-based eClinicalWorks. John Halamka, chief information officer at Beth Israel Deaconess Medical Center and HMS professor of medicine, and Ashish Jha, HMS associate professor of medicine at Brigham and Women’s Hospital, are quoted.