Giants quarterback Eli Manning could miss the team's preseason game against the Steelers this week. Manning suffered a gash that required 12 stitches during Monday night's 31-16 win over the Jets. Since then, he hasn't been able to put on a helmet. "Initially, with Eli being the kind of guy he is, the idea for me going forward was: 'How are we going to make it so he can practice and play with the stitches?' " coach Tom Coughlin said. "There is concern there from the doctor's standpoint, because the nature of where the helmet sits according to where the stitches are could create a problem in terms of healing."