15:00, first and 10, Cowboys' 41: Maybe you can blame the lockout for this sack. The play was poorly executed. Either way, the 49ers obviously need more work.On the play, quarterback Alex Smith was supposed to fake a handoff, roll away from the line and throw to the running back or tight end Vernon Davis with a quick screen. Davis initially blocked outside linebacker Anthony Spencer. Then, as you're supposed to do with screens, he let Spencer go. But Davis let Spencer loose too soon or the play was slow to develop. Spencer was immediately in Smith's face for the sack. It's notable that this was the only sack that didn't lead to an Andy Lee punt.
4:36, second and 10, 49ers' 30: This sack was a simple case of Dallas having more rushers than the 49ers had blockers. The Cowboys sent seven and the 49ers had just six blockers. The unblocked man was defensive end Jason Hatcher, who crashed into Smith. Running back Frank Gore may be Smith's emergency outlet, but he slipped while trying to get through the line. Smith had no time to get a pass away anyway.
14:12, third and eight, 49ers' 22: Sack No. 3 was due to poor technique. The Cowboys rushed only five and the 49ers had seven to protect, including Gore and tight end Delanie Walker. Spencer, however, split the double team of Joe Staley and Mike Iupati,and flushed Smith, who was in the shotgun, to his left where Hatcher, looping around to the outside, was waiting for him. Hatcher got credit for the sack, but Spencer made it happen.6:39, first and 10, Cowboys'
49: After a big, 43-yard kickoff return by Kendall Hunter, the 49ers lost momentum with another first-down sack.
Staley and Iupati were double-teaming DeMarcus Ware, who slipped past the outside of Staley's left shoulder and then swiped at the ball just as Smith brought his arm back to throw.
Smith did a remarkable job of holding onto the ball but, once again, minus-seven yards was too much for the offense to make up. Three plays later, the 49ers punted.
5:31, second and eight, 49ers' 35 : This play can be looked at in contrast to the effective play fake the Cowboys ran in overtime on which cornerback Carlos Rogersand safety Donte Whitner bit hook, line and sinker.The 49ers ran their own play fake, this one coupled with a rollout by Smith to his right. Neither Spencer nor Ware was blocked. It's hard to say how the 49ers were going to account for Ware, last year's NFL sacks leader, on the play. Maybe they thought he would bite inside. He didn't, and he easily sacked Smith for an eight-yard loss.
13:52, second and three, 49ers' 39: The Cowboys had scored on their last two drives to send the game to overtime, and there was no way the 49ers wanted to take a negative play and give the ball back.The Cowboys rushed five, but Ware broke off his rush to cover Gore, to whom Smith wanted to check down. Meanwhile, nose tackle Jay Ratliff turned center Jonathan Goodwin's shoulders and charged toward Smith.
Smith's vision was locked to his left, but no one was open. Had he turned to his right, he would have seen Joshua Morgan all alone. But there was no time, and Smith was sacked for the sixth time.
Read more: http://www.sacbee.com/2011/09/21/3925770/how-all-those-dallas-sacks-of.html#ixzz1Yb6Eo7dr
the only sacked he can possibly be blamed for was the last one and its because he decided to look left first instead of the right first