Several roster spots are still up for grabs as the Dallas Cowboys square off against the Miami Dolphins Wednesday night at Cowboys Stadium.

The preseason match-up starts 8pm eastern time, and you can watch streaming online here.

The Cowboys will rest many of their starters in preparation of their Week 1 showdown with the NFC East rival New York Giants. Quarterback Tony Romo, running back DeMarco Murray, cornerback Brandon Carr, and linebacker Sean Lee will not play against the Dolphins, which gives several players a chance to play themselves onto the team.

Wide receivers Miles Austin and Dez Bryant will also be sidelined.

Stephen McGee and Rudy Carpenter have battled for the third quarterback spot this preseason and how they play Wednesday could determine the outcome. McGee has taken more snaps, going 18-for-31 186 yards and one interception. Carpenter has gone 6-for-14 for 78 yards and one touchdown.

There is also a running back competition in Dallas down to three players. Murray and veteran Felix Jones both have a history with injuries and the Cowboys might carry four running backs going into the regular season as insurance. Rookies Jamize Olawale and Lance Dunbar, who both played at North Texas, and Phillip Tanner are all in the mix.

While the Cowboys rest starters, Miami is expected to give the first team offense some time.

Rookie quarterback Ryan Tannehill won the Dolphins' starting quarterback job and will start Wednesday night. In his first three preseason games, Tannehill has gone 36-for-71 and 379 yards with one touchdown and one interception. His last outing in Miami's 23-6 loss to the Atlanta Falcons, Tannehill went 11-for-27 for 112 yards and an interception.

Who will be Tannehill's receivers is a huge question for the Dolphins. Miami currently has 11 wide outs on the roster, and how well they perform against Dallas could determine who will make the roster.

According to the Sun Sentinel, the Dolphins are looking for receivers via trade or free agency and only Davone Bess is assured a spot.

A veteran like Legedu Naanee has dropped several passes this preseason and his spot is not secure, and if receiver Brian Hartline wasn't injured the Dolphins may have already waived their second-leading receiver of 2011.

Prediction: Even though they are fielding starters Wednesday night, the Dolphins offense has been anemic all preseason. The Cowboys are banged up, but their improved pass rush should frustrate and confuse Tannehill.

Predicted Score: Dallas 28,  Miami 10