Sixteen days and this undrafted free agent had seen enough of the NFL. Squirrel White, who signed with the Bears after not being picked in the 2026 NFL Draft, promptly retired from football Monday. The former Tennessee and Florida State receiver battled injuries throughout his college career, playing in just 10 games for the Seminoles last season while tallying five catches for 52 yards in his senior season. Squirrel White retired from the NFL after just 16 days. Getty Images White battled multiple ailments during his career in Tennessee as well, including a PCL sprain that hampered him through the end of his college career. He was an intriguing prospect in the undrafted free-agent pool, with blazing 4.28 40-yard dash speed, though he was undersized at 5-foot-9 and 177 pounds. He was not invited to the NFL Combine. While in Chicago at rookie camp, White was seen walking off with trainers at last Friday’s practice and did not return to the field.…