Eli Manning -- I'm Just Tryin' to Stay Outta the Gutter ...

Sporting some traditional red & blue bowling kicks, khaki shorts and a facial expression that says, "Errr mah gerd" ... Eli Manning hit up a NY bowling alley with his teammates Tuesday night and TMZ has the pics.

Eli, along with wideout Victor Cruz and the entire NY Giants squad, snuck into Frames in midtown Tuesday night -- with a police escort -- for a top secret bowling session.

According to Frames, the event was 100% alcohol-free ... since the team is in the middle of some hardcore pre-season training. Nothing but juice and water.

Despite looking goofy on lanes, Eli actually put up some pretty decent numbers that night -- bowling a 154.

Cruz wasn't too far behind, posting a respectable 134. Coach Tom Coughlin scored a 113.