EAST RUTHERFORD, N.J. -- Jeremy Shockey was so annoyed about being deactivated for the New York Giants' game Monday night against Tampa Bay that he put himself through a hard workout before the game and aggravated his sprained left knee.
The setback forced the Pro Bowl tight end to miss practice Thursday. His status for the Giants' home game Sunday against the Buffalo Bills is uncertain.
Coach Jim Fassel listed Shockey as day-to-day Thursday after saying earlier in the week that he expected him back in the lineup for the first time since he got hurt Nov. 9.
Shockey left his knee brace off during his self-imposed workout before the game, so there was nothing to protect his sprained posterior cruciate ligament.
"I thought I could play last week and got the word I wasn't going to," Shockey said. "I went out there and did some stupid things that right now I'm kind of regretting.
"If it was an injury where I didn't think I could do it, I wouldn't play. But I felt I could play. I felt it important for me to play because we'd have had a chance if we'd won it. Now, watching from the sidelines, and obviously losing it, it's really made it hard on ourselves."
The Giants (4-7) have lost three straight games.