United States striker Jozy Altidore is likely to miss the centenary Copa America in June after being ruled out of action for 6-8 weeks with a hamstring injury, his club side Toronto said on Monday. The 26-year-old suffered the injury while taking a penalty kick during a Major League Soccer game on Saturday. Altidore, who had been included in the US preliminary 40-man squad for the June 3-26 tournament, has a history of hamstring problems. In 2014 he suffered a hamstring pull in the first match of the World Cup and missed the rest of the tournament. US national team coach Jurgen Klinsmann must name his 23-man Copa America roster by Friday. The Copa America, which will be held across 10 US cities, will feature six teams from CONCACAF and all 10 teams from CONMEBOL.