McAdoo said he wanted to get Marshall involved earlier, but it didn't work out. He added the coaching staff saw what Dallas was doing on defense and New York just had too many mistakes to take advantage.
Beckham has not practiced since being hurt in a preseason game against Cleveland three weeks ago. He started stretching with teammates at practice last week and warmed up before Sunday's game under the watchful eyes of McAdoo and general manager Jerry Reese before being declared out.
The Giants ran 50 plays on offense. The defense was on the field for 70,Authentic NBA Jerseys Cheap.
It seemed a lot more.
It's clear though, the offense desperately needs him after a season-opening 19-3 loss in Dallas.
Right tackle Bobby Hart sustained an ankle injury, but McAdoo did not have any details about the extent of the injury.
McAdoo refused to point a finger,Soccer World Cup Jerseys, saying the line wasn't the only group on offense missing assignments.
One of the main problems was the offensive line, which came into the season as the team's biggest concern. It was worth worrying about. Manning was sacked three times, under pressure a lot more, and hit four times.

Eli Manning completed 29 passes for 198 yards, with only two passes going for more than 20 yards with the Cowboys playing a soft zone to keep New York from going deep. With Beckham and his game-breaking ability missing,Cheap World Cup Jerseys, it was the perfect plan.
"We had some technical breakdowns and, again, it's not one guy," McAdoo said. "There's enough to spread around, and the tight ends are in there as well. The running backs fit in. Again, it's not just the offensive line."
"What we need to work on as a team, quite simply, play more offense and less defense," McAdoo said.
Coach Ben McAdoo was not sure Monday whether the continued rehabilitation would get his three-time Pro Bowl receiver on the field in time for Monday night's home opener against the Detroit Lions (1-0). Day to day is all the coach will say about his status.
The offense was hard to watch without Beckham. It was limited to 233 total yards, including 35 rushing.
His absence was obvious, and a bonus for his agent whenever he starts negotiations on a new contract with the Giants.
"We're confident with the guys we have, and we are confident in our depth," McAdoo said when asked about possible changes on the line. "If we feel we need to make a change, we'll make a change."
"A lot goes into every game in this league," McAdoo said. "This just happened to be the first one. It didn't go the way we wanted it to or the way we planned. We need to understand,China Adidas Hockey Jerseys, it's one of 16 and we are blessed with a long week this week, and we have to find a way to get better going into Week 2."
Free agent wideout Brandon Marshall,Cheap China Jerseys, signed to give Manning a second option on the outside other than Beckham, didn't catch a pass until the Giants' final play of the game.
EAST RUTHERFORD, N.J. (AP) — Odell Beckham Jr. is going to work with trainers over the next few days to get his sprained left ankle healed and get on the field to jump-start the New York Giants' stagnant offense.