On Monday, ESPN's Chris Mortensen reported that Newman would be out this week and that he could end up being sidelined through the end of the regular season.
Officially, he was listed as having not participated in practice Wednesday, the Bengals' first ahead of this Sunday night's game at Pittsburgh.
Newman has been wearing a long leg brace to stabilize his left knee and using crutches the past four days. It doesn't appear he will be near a field between now and the weekend.
Running back BenJarvus Green-Ellis also didn't practice Wednesday. According to Cincinnati's injury report, he was out with an illness. In the Bengals' 42-28 win over the Colts, he rushed for 48 yards and two touchdowns on 17 carries. His physical running style has keyed some of the Bengals' most prolific rushing performances this season. Not only did he play a part in the Bengals rushing for 155 yards last weekend, but his 92 yards against the Chargers the week before helped pace a 164-yard ground attack.
Four other Bengals practiced in a limited capacity. Linebacker Vontaze Burfict, defensvie linemen Wallace Gilberry, safety George Iloka and receiver Marvin Jones were among the limited. Offensive guard Kevin Zeitler went through full practice participation day, as he rehabs from a foot injury that has forced Mike Pollak to start the last three games in his place.
Here's a look at the Bengals' full injury report:
DID NOT PARTICIPATE
CB Terence Newman (knee)
RB BenJarvus Green-Ellis (illness)
LIMITED PRACTICE PARTICIPATION
LB Vontaze Burfict (thigh)
DL Wallace Gilberry (knee)
S George Iloka (concussion)
WR Marvin Jones (shoulder)
FULL PRACTICE PARTICIPATION
OL Kevin Zeitler (foot)