cornerback Marshon Lattimore underwent testing for a brain injury during Sunday's loss to the New England Patriots, and if Wednesday's practice was any indication, Lattimore likely did suffer a concussion.
Lattimore was not on the field during the portion of practice open to media Wednesday. The team's official injury report should provide clarity on the rookie's absence.
Defensive tackle Mitchell Loewen also missed practice Wednesday with what one source on Monday called a high ankle sprain.
Offensive tackles Terron Armstead (shoulder) and Zach Strief (knee) also remained out after missing Sunday's game.
Two players that were spotted at the beginning of practice were cornerback Sterling Moore (pectoral) and defensive end Trey Hendrickson (left leg), both of whom suffered injuries in the game.