(WNFL) - The Green Bay Packers' interception leader from a year ago might be heading to injured reserve. Second-year corner Casey Hayward aggravated a severely-pulled hamstring in last Sunday's loss to Philadelphia. Yesterday, coach Mike McCarthy said Hayward would be out "multiple weeks" after two recurrences of the hamstring problem that first cropped up August 23rd in an exhibition against Seattle. McCarthy wouldn't say if Hayward was headed to the I-R but quote, "To lose a whole year I know is frustrating for him." Hayward played in the Packers' last three games, but was not much of a factor. The Packers will need to open a roster spot if they want to activate safety Sean Richardson and-or defensive end Jerel Worthy. Both returned to practice this week as they remain on the physically-unable-to-perform list. The Packers must decide in two weeks if they want to activate Richardson and Worthy, cut them, or place them on injured reserve. Meanwhile, the Packers have no new changes to their injury report. McCarthy said he'll wait to decide the playing status of right tackle Don Barclay, who hurt a knee against the Eagles. The 5-and-4 Packers play the 3-and-6 Giants at New York on Sunday.