The first joint practice between the Baltimore Ravens and San Francisco 49ers on Saturday went off without a hitch, as the teams took to heart the coaches' message to play it safe.

The two physical teams practiced without incident for about 2½ hours, two days after the Ravens beat the 49ers 23-3 in the preseason opener.

Before practice, the 49ers placed injured wide receiver Chuck Jacobs on waivers. Jacobs tore an anterior cruciate ligament in the game Thursday night. To fill his roster spot, the 49ers signed receiver Lance Lewis. Lewis played three games for the Washington Redskins last season before joining the Dallas Cowboys practice squad.

Both 49ers coach Jim Harbaugh and Ravens coach John Harbaugh stressed that safety would be paramount when the teams met for the first of their three joint practices.