The American League playoff race is heating up, with several contenders facing key concerns and X-factors. The Yankees, with their injury-riddled roster, must overcome health issues to make a deep postseason run. The Blue Jays, surging in the standings, depend on Vladimir Guerrero Jr.’s consistency and pitching depth. The White Sox, despite their strong offense, need to address their bullpen woes. The Red Sox, meanwhile, are dealing with a managerial change and must find a way to gel.