http://www.nj.com/jets/index.ssf/2013/06/jets_stephen_hill_sits_out_of.html This is starting to look serious.... im getting concerned... they said he was ok and about ready to go last week,now he's right back on the bench.
Problem with draining the knee is it doesn't take care of the source of the drain. He's probably got a lot of inflammatory changes in the cartilage there.
Doctors say it is normal. "Doctors told him that the fluid in his knee is normal, although they expected it would happen earlier, and he isn't sure if he's going to need to have it drained." http://espn.go.com/new-york/nfl/story/_/id/9345935/stephen-hill-new-york-jets-swelling-fluid-knee