Fielding:
Throwing to the wrong base.
Forgetting how many outs there are.
Not backing up bases or covering the right base.
Running:
Forgetting how many outs there are.
Running with your head down right into the runner ahead of you.
Running to 3B with a ball hit right in front of you (left-side IF), when you can see it's hopeless.
It was way more than "a few".
Now, the aggressive base running outweighed much of the blunders, if not more than outweighed it. Overall, out base running was a plus and our defense was a plus, but without the mental blunders, we'd have been much much better in both areas.