Some positions and players to watch in tonight's Ravens preseason game:
Position: Running back. The Ravens will keep a close eye on their unproven combination of Jason Brookins and Chris Barnes in order to evaluate whether they need to sign veteran Chris Warren this week. If either Brookins or Barnes surprises, the team will hold off adding another back.
Veteran: Quarterback Elvis Grbac. The free-agent pickup from the Kansas City Chiefs is expected to play only a series or two. But he wants to shake off his performance in the team's intrasquad scrimmage, when he was 1-for-4 passing with an interception.
Rookie: Defensive back Gary Baxter. The second-round pick out of Baylor will fill in for the injured James Trapp as the team's nickel back. A strong showing may heat up the competition when Trapp returns.
On the bubble: Defensive tackle Kelly Gregg. The third-year reserve tore up NFL Europe with six sacks, three forced fumbles and 40 tackles, but finds himself in the team's deepest position. With Larry Webster and Tony Siragusa not expected to play, Gregg will have more playing time on the second unit.