The Premier League club have signed Joe Allen, Nuri Sahin, Fabio Borini and Oussama Assaidi so far this summer, and Rodgers eyes more acquisitions.
"I would hope we could get some more players in," he is quoted as saying on Liverpool's official website.
"The players just need help. We lost players in the summer and we were only able to bring in a few to replace those.
"If we're going to strengthen, then hopefully we can get a few more in."
Liverpool drew 2-2 with Manchester City at Anfield in the Premier League on Sunday.