Yu seems kind of empty-headed sometimes. Two of the runs today results from Yu giveaways, right? One time, he didn't cover 1B. Free baserunner, extra out to play with. Another, runner on 2nd with one out, Yu was clueless, the guy took a walking/running lead, Yu was clueless, and the guy ran over to 3B unrestrained; then scores on an infield bounce-out.
And then of course he walked guys early in innings twice, both of which ended up scoring.
He just doesn't seem to have much awareness.