‘The Bills added the 31-year-old Kirksey, a nine-year NFL veteran who started all 17 games for the Texans in 2022, to the practice squad Aug. 31 after releasing Klein while cutting down to the initial 53-man roster. He was not elevated to the active roster for either of Buffalo’s first two games. Kirksey is the second player to retire from the Bills this season, following offensive tackle Brandon Shell during training camp.’