Grammar Quiz #14 Garrison scores again, but for not quite the right reason. “May” should be “might”, he says. The reason we have a problem is that “may have” indicates that it’s still possible they won. They didn’t. It should be “might have won.”
Dr. John’s Grammar Quiz #15: Can you spot the glaring grammatical error in this sentence? “A first time author at age 66, McCourt’s memoir has topped the best seller list and won critical acclaim.”
WriterCare with Dr. John 
Critical acclaim is not a prize to be won. It’s something to receive along with whatever prize was actually won.