Seffner Christian's Tyrell Carter and Karmi Mackey had defined roles on the field. Carter was a receiver, Mackey the star running back. That changed in the spring when Mackey tore his ACL. It was a tough blow for the Crusaders. Mackey rushed for 1,953 yards and 20 touchdowns last season. Carter took over at running back, replacing his best friend. "It was different," Carter said. "I had some big shoes to fill. Karmi is a great running back but it was too risky for him to rush things and come back too soon."Carter, a 5-foot-9, 190-pound senior, shined in his new role. Last week, he rushed for 232 yards on 10 carries and scored three touchdowns in a 57-34 win over St. Petersburg Catholic. "I didn't know I had that many yards until afterward," Carter said. "It was a surprise, but I knew I could do something like that."Carter puts up numbers wherever he lines up. Last year, he had 467 yards receiving and seven touchdowns. He said running back is his more natural position. "I've played running back for as long as I can remember," Carter said. "Hopefully, I can play there in college, too. But I'll play anywhere."