Man down

Well, I couldn't resist checking out VOYA's new "Man Up" column. (If you have no idea why I was curious, it really isn't important.) I was amused to encounter this sentence toward the end:

"Teenage guys could care less about retired athletes, even if he is named Michael Jordan."

Fifteen words, two errors. Granted, one of the errors is debatable, but most people who care about grammar recongize "could care less" as sloppy. There is no wiggle room in the other error. The singular/plural mang...