On the last day of the Cowboys' two-day practice sessions with San Diego, Cowboys wide receiver Dwayne Harris got popped near the goalline by Chargers cornerback Quentin Jammer.

Harris lost his helmet during the collision but wasn't upset.

"He's a competitor. He's trying to make a play just like I was and everybody else was out there," Harris said of Jammer. "I don't blame him for it. It's football. You're going to take hits. You get up and go to the next play."

Harris is involved in a tough competition for the No. 3 receiver spot. Kevin Ogletree (outside) and Cole Beasley (slot) currently are getting the snaps with the first-team.

Because of injuries to Miles Austin and Dez Bryant, Harris will get reps with the first-team.

With Bryant and Austin expected to miss the last two preseason games, Harris has an opportunity to showcase his skills against first- and second-team defenses.

"I feel good about my talent and what I've done as far as help the team out," said Harris, a sixth-round draft pick entering his second season. "As far as special teams and receiver, my job is to come out here and play football and the coaches' job is to coach."

Last season, Harris finished with zero catches and had minimal results as a returner, averaging just 5.3 yards on punts and 28.9 yards on kickoffs. After making the 53-man roster, Harris was cut in October but was signed to the practice squad. He was elevated to the active roster in December and participated in seven games.

The Cowboys drafted wide receiver Danny Coale in the fifth round this offseason after the door opened to find a new No. 3 receiver when Laurent Robinson signed with Jacksonville.

"Every day is a competition," Harris said. "It's a competition with yourself. Everybody wants to get on the field. You have to get out there and prove to yourself and the coaches you got to do the job. That's what I come out here every day and try and do."