Kelsey (pectoral) reverted to injured reserve Sunday.
Kelsey will spend his 2018 campaign on IR after suffering a pectoral injury during the Steelers' preseason finale, having also gone unclaimed after being waived/injured Saturday.
Kelsey injured his pectoral during Thursday's preseason game against the Panthers and will not return.
Kelsey is simply a depth option for the Steelers at inside linebacker. With Jon Bostic and L.J. Fort already backing up starters Tyler Matakevich and Vince Williams, Kelsey might find himself on the wrong end of final roster cuts in the coming days.