Terrell Owens had an MRI on his stiff lower back Monday. Cowboys coach Wade Phillips said the test was precautionary after Owens didn't feel any better following treatment Sunday, when he also missed practice. The team was awaiting the results, but the coach didn't sound too concerned. "We feel sure that he just has back spasms, but we don't want to take any chances," Phillips said after the first of the team's two practices. "There's no alarm, but we wanted to make sure."