By losing Friday night’s Subway Series opener, 5-1, to the Mets at Citi Field, and with the Blue Jays disposing of Boston, 6-1, up at Rogers Centre, the Yankees no longer control their own destiny in the American League East. At 80-66, they trail Toronto (85-62) by 4 ¹/₂ games, so with just three games remaining against the division leaders, the Yankees can’t simply win out and prevail. They must watch the scoreboard and hope others help them upend the ultra-dangerous Blue Jays, whose magic number to clinch the division dropped to 12.