Lilia Vu won the Meijer LPGA Classic in a playoff Sunday in her return from a back injury, spoiling Lexi Thompson’s bid for her first victory in five years. Playing for the first time since the Ford Championship in late March in Arizona, Vu beat Thompson and third-round leader Grace Kim with a 5-foot birdie putt on the third extra hole — the par-5 fourth at tree-lined Blythefield. Thompson, the 2015 winner, has said this will be her last year playing a full schedule. Vu birdied the par-5 18th in regulation for a 7-under 65, then twice more to match Thompson and Kim — who entered the day five strokes ahead of Thompson and eight clear of Vu — on the first two playoff holes.