Detroit safeties Louis Delmas and Amari Spievey will miss Sunday's game at Minnesota.
Delmas has a knee injury, and Spievey is recovering from a concussion. Wide receiver Calvin Johnson was limited in practice Friday and is listed as questionable.
Johnson toughed out Detroit's 31-14 victory over Jacksonville last weekend, catching seven passes for 129 yards after getting a pain-killing shot in his left knee. The All-Pro receiver is still banged up, but even if his practice time remains limited, he's a big part of the Lions' offense.