Jim Harbaugh: We have some work to do

BALTIMORE -- Some notes gathered in the locker room after the San Francisco 49ers' 23-3 preseason loss to the Baltimore Ravens:

  • Coach Jim Harbaugh said his first impression was his team has some work to do. Harbaugh said the biggest concern was the defense seemed to get pushed around. The 49ers are playing shorthanded and a lot of young players had to play extensively.

  • It appears the injuries to defensive linemen Demarcus Dobbs and Lawrence Okoye and receiver Chuck Jacobs are minor. However, Okoye had ice on his foot and had to be helped out of the locker room.

  • Harbaugh was pleased with the way rookie running back Carlos Hyde ran. Hyde was authoritative and explosive as he had 39 yards on five carries.

  • Harbaugh also pointed out the play of receiver Bruce Ellington, who shined on offense and on special teams.

  • The 49ers are banged up on the defensive line and had four healthy players on the unit by the end of the game. Harbaugh said the team could add at the position for numbers help. Fullback Will Tukuafu played some defensive line Thursday. He was a defensive lineman before being moved to fullback.

  • Second-year tight end Vance McDonald, who has made big catches but also dropped easy balls in training cap, caught both passes that came his way in the game.

  • Right guard Joe Looney was blown up on a third-and-1 play in which the 49ers lost a down and had to settle for a field goal on the opening drive. Looney is playing with the first team because starter Alex Boone is holding out.

  • First-round pick Jimmie Ward played well at nickel and safety.