For nearly three months, few worried for Andrew McCutchen. From the time the Pirates center fielder landed at the Mendoza line May 23 to when he ripped Toronto Blue jays starter Marcus Stroman’s fastball for an RBI double in the third inning of the Pirates’ 4-2 win Friday at Rogers Centre, McCutchen batted .351 with an OPS a smidgen below 1.100. A freak injury Friday caused reality to crash over the Pirates like a wave. Two plays after doubling, McCutchen took his secondary lead and felt his left knee grab. He asked for time, summoned an athletic trainer and then limped down the dugout steps and continued into the clubhouse. What followed was the diagnosis “left patellofemoral discomfort” and a sigh of relief. McCutchen, who was bothered by his left knee throughout the 2015 season, was treated with ice and electromagnetic stimulation but did not have an MRI. Officially listed as day-to-day, McCutchen said depending how his body felt in the morning, he hoped to play again Saturday.