OXNARD, Calif. - The Cowboys practiced goal-line plays for the first time in training camp Saturday. Apparently that wasn't enough clashing for the offensive and defensive linemen.A fight broke out between the two units during one-on-one drills after reserve defensive lineman Antwaun Woods threw a punch at All-Pro center Travis Frederick.Woods drove back Frederick in one-on-one drills after Frederick struggled to keep his footing on the clumpy grass.