The Detroit Lions have encountered their share of trouble with second-round draft picks, but hope Darius Slay won't be the next chapter in that sordid tale.

ESPN's Adam Schefter reported Tuesday that the cornerback out of Mississippi State underwent arthroscopic knee surgery Friday. The procedure comes as a surprise, but Slay is expected to be ready "well before training camp," according to Schefter.

Slay told Around The League before the draft that doctors said surgery would not be required on the torn meniscus he suffered in his right knee during the offseason. ESPN reported last month that a pocket of opposing physicians believed that a procedure would ultimately benefit the defensive back.

Slay produced strong results at the NFL Scouting Combine and went into the 2013 NFL Draft at No. 59 on Mike Mayock's Top 100 big board. The Lions -- who didn't expect the injury to be a major concern -- already have Slay penciled in as their starting right corner, and hope he can bring more to Detroit than recent second-round busts Titus Young and Mikel Leshoure.