Hartline was injured Sunday in a 24-10 win over San Francisco. He made eight catches for 107 yards before he got hurt while being tackled in the second half. The Browns said he had surgery on Tuesday in Cleveland. Hartline, who signed as a free agent in the offseason, finished with 46 catches for 523 yards and two touchdowns.
With Hartline out, Terrelle Pryor could get more playing time this week in Seattle. He made his debut Sunday but did not make a catch.
The Browns also signed defensive back Daryl Richardson, who has appeared in 24 NFL games.
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