Scotland picked teenager Tyler Fletcher for the World Cup as a surprise injury replacement Sunday despite the midfielder playing less than 20 minutes for Manchester United this season. The 19-year-old Fletcher was asked by Scotland coach Steve Clarke to gain experience last week practising with the senior squad, then got a shock call-up after Napoli midfielder Billy Gilmour suffered a knee injury Saturday in a 4-1 win over Curacao in a warmup game. Fletcher made his national-team debut Saturday as a half-time substitute and got the World Cup call ahead of players including 19-year-old Lennon Miller, who had a full season in Serie A with Udinese.