Ravens nose tackle Haloti Ngata remained away from the team to deal with what Harbaugh said Sunday was a personal matter. Ngata, who probably wouldn't have played in Thursday's preseason finale anyway, has been excused from practice the past two days.
Fellow defensive lineman Arthur Jones and linebacker Pernell McPhee (knee) also did not practice. McPhee has been sidelined since early last week and did not play in last Thursday's game against the Carolina Panthers.
The other Ravens not practicing have been out indefinitely: Thompson (foot), tight end Dennis Pitta, (hip), center Ryan Jensen (foot), linebacker Jameel McClain (spine) and defensive end Kapron Lewis-Moore (knee).
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Meanwhile, backup quarterback Tyrod Taylor, who was tested for concussion following last week's game, was on the practice field for a second straight day. Because the Ravens are only expected to carry two quarterbacks into the regular season, there is a decent possibility that Taylor wouldn't play Thursday in St. Louis even if he was fully cleared.
With starter Joe Flacco unlikely to play as well, that would leave veteran Caleb Hanie and the recently signed Dayne Crist as the Ravens' quarterbacks for that game.