Maybe this is what relief sounds like. Trent Richardson is calling from an office in Legion Field, home of the Alliance of American Football’s Birmingham Iron. On his off-day, he answers questions about the first three games of his new life and career as a running back for the Iron, a franchise in the startup AAF. He’s leading the league in carries (59) and touchdowns (6) by a substantial margin, though he’s sixth in yards (145). His team is 3-0 and, for the first time in a while, those around him seem to think he’s happy. He’s loving football again.