You wouldn't know trying if it bit you in the ankle. He's gone 5 innings and given up 2 runs. If he goes one more inning and gives up 1 run, it will be a quality start. Toronto has 7 hits: 5 singles and 2 doubles. In the big 2 run rally in the 4th they had 4 ground ball singles.
Bello has been struggling for just about all of May and June, so the very last thing that can be said about tonight is that he is "not trying."
The other thing that bugs me about all this negativity is that the Sox are leading, 3-2 (now 4-2), and, if they win, it will be 5 straight. So why pick on Bello when he's already gone 5 innings while giving up 2 runs?