Rookie defensive lineman Jashon Cornell's season is over.
The Detroit Lions placed Cornell on injured reserve Thursday, two days after he suffered an Achilles tendon injury in practice.
Cornell, a seventh-round pick out of Ohio State, was injured during a one-on-one pass rush drill.
His injury was the type of non- or minimal-contact injury that spiked during the 2011 lockout, when players did not have a formal offseason program, and that NFL teams were worried about this summer.
In 2011, 10 players suffered ruptured Achilles tendons in the first 12 days of post-lockout practice, including five rookies, according to the Journal of Orthopaedic and Sports Physical Therapy.