Dat Nguyen talked about this yesterday on his show. He said he's not surprised that Livings is injured again, because when Leary returned to practice, he was doing very well, and Jerry and Stephan went over to Leary and expressed how happy they were with his return and play. Dat said that Livings saw this and decided his knee injury was getting worse, and wanted to protect this year's salary by landing on the IR. Dat said it happens all the time with veteran players.
He also said he talked to Hangartner, a former Aggie, and he told Dat he was blind sided by his release. He is healthy, and was running with the first team. He did say that he had an off year last year, but that his salary was $1.5 million and that the Cowboys should have been first in line to sign him. He plays both OG and C.