HOUSTON—After seven Super Bowl wins and more than two decades in the NFL, Tom Brady remains a student of the game. On Saturday after he wrapped up his 22nd preseason by leading the Tampa Bay Buccaneers to a victory over the Houston Texans, he reflected on how important it is each time he steps on the field. “Every time you play, you learn something,” he said. “I’ve been doing this a long time, but you (can’t) … take anything for granted.” Brady threw for 154 yards and a touchdown in just more than a quarter in the 23–16 win. It was by far his most extensive work this preseason after the three-time NFL MVP played just six snaps in a loss to Cincinnati two weeks ago and sat out last week against a loss to Tennessee. Brady got off to a slow start, throwing two incompletions on his first drive …