premise: Jackson will lead McLainSenior quarterback Shawn Jackson racked up nearly 2,500 yards of offense last season and scored 22 touchdowns despite a high ankle sprain for much of the year . And that was when Tulsa McLain was outmatched in Class 5A. Now , Jackson will lead the Titans in Class 4A. How did he sustain a high ankle sprain ?
hypothesis: He was tackled by a linebacker .