LONDON (AP) — After 10 months out injured, Danny Welbeck took barely 10 minutes on his return from surgery to score a precious goal for Arsenal. The striker’s header in the fifth minute of stoppage time secured a 2-1 victory over Leicester on Sunday, cutting the surprise Premier League frontrunner’s lead over the London club to two points. Leicester was leading through Jamie Vardy’s 45th-minute penalty at the Emirates Stadium when Danny Simpson received two yellow cards in the opening nine minutes of the second half. Arsenal had failed to register a shot on target at that stage, but Arsene Wenger’s substitutions delivered as intended. Theo Walcott equalized with 20 minutes to go and Welbeck, who replaced Alex Oxlade-Chamberlain in the 83rd minute, headed in Mesut Ozil’s free kick in the fifth minute of stoppage time on his return from left knee surgery. “In the last two training sessions he was very strong,” Wenger said. “Everyone is extremely happy for (Welbeck) because he has been out for 10 months which is an eternity for a player.” It ensured Arsenal became the first team to complete the double this season over Leicester, which has only lost three times in the league….