IRVING, Texas -- In order to break out of their 8-8 doldrums, the Dallas Cowboys will need a lot to go right in 2014.

This week we take a best-case, worst-case look at five offensive and defensive players who will go a long way in shaping the Cowboys' season.

The cornerbacks

Best case: They lock it down

Brandon Carr has said he wants to take over the league. Morris Claiborne knows he is in the fight for his career after two disappointing seasons. Orlando Scandrick was their best corner last year and perhaps their best defender this year. The Cowboys have invested in them heavily in contract and draft position. Rod Marinelli said he has not had three man-to-man corners like these guys. Carr, Claiborne and Scandrick believe they are better suited to play more man than zone, which frustrated them at times in 2013. But they weren't great at man either and the coaches did not have enough trust to let them handle receivers all over the field. Carr and Claiborne, who will have to take away the starting spot from Scandrick after losing it last year, have the physical tools to be top press corners. Scandrick is as competitive as anybody on the roster and understands route concepts the best. They have to make plays early in the season to not only build their confidence but to build the confidence of the rest of the defense.

Worst case: No help from the pass rush

A cornerback's job is a lot easier when the front seven can affect the quarterback. Sacks and pressures are great, but if a quarterback is afraid of the pass rush he will get rid of the ball sooner. That means there is less time for a corner to have to defend and more chances at interceptions. The Cowboys lost their all-time leader in sacks (DeMarcus Ware) and last year's leader in sacks (Jason Hatcher) in the offseason. They replaced them with a rookie second-round pick (DeMarcus Lawrence) and Henry Melton, who is coming back from a torn ACL. They also added numbers to the position in players like Jeremy Mincey, Terrell McClain and Amobi Okoye but they have questions. Anthony Spencer might not be able to play until the seventh week of the season. Tyrone Crawford is coming back from a torn Achilles and didn't have a sack in his rookie season. Marinelli is not known as a coordinator who brings a lot of pressure. If they can't affect the quarterback, then Carr, Scandrick and Claiborne will have a difficult time staying with receivers.