The Buffalo Bills, dealing with multiple issues on the offensive line, traded defensive end Eli Harold to the Philadelphia Eagles for rookie offensive lineman Ryan Bates on Friday.
Harold, 25, has played four seasons in the NFL, producing 94 tackles and nine sacks in 61 games (25 starts) for the San Francisco 49ers (2015-17) and Detroit Lions (2018). He signed with the Bills in April.
Bates, who went undrafted out of Penn State, mostly was getting third-team reps in Eagles training camp.
Buffalo lost two offensive linemen to injury in its first preseason game — Conor McDermott (concussion protocol) and Russell Bodine (oblique). Mitch Morse remained in the concussion protocol and Ty Nsekhe missed practice Friday.
Also, LaAdrian Waddle sustained a torn quad muscle and was placed on injured reserve earlier this week, Isaac Asiata retired in the offseason and Jeremiah Sirles was released after sustaining a foot injury before the start of camp.