Derrick Mason says he's comfortable with the Texans offense heading into his Sunday debut. "From what they've given me game plan-wise, I'm 100 percent," Mason said. "The things they're asking me to do Sunday I'm sure about. I'm confident I can go play full speed." ESPN New York reported Friday that Mason had failed to master the Jets playbook before being traded, so he shouldn't be expected to seamlessly fit into the Texans offense. He's a poor bye week fill-in for Week 6.