In a nutshell, that's why he can't hit.
I don't hate him at all- mainly because as some have said, he has some value- he can run, plays pretty good defense, and he is a pretty good bunter and he does play hard- there's no question about that. That doesn't mean he should be out there everyday of course, but he's hardly useless.
Some of the other guys mentioned- like Rutledge, Bunky Kateon, and Jet Butler- I did question their effort at times and that's my biggest pet peeve among baseball players at any level- aside from t-ball, rec league, and church league. Also, Polk kept putting Rutledge and Kateon out there for wayyyyyyy too long. Well into the SEC season. With Jet, we didn't have much of a choice because we lacked talent overall, he would be a role player on the team that we have now. I'm still shocked that the Mets drafted him. No wonder their team has gone to pot. At least Cohen has shown that he will sit Frost- which is what happened last year once SEC play started.
And in Cohen's defense- playing Frost was more excusable tonight than others. We had CT starting at pitcher, I think they were hoping to get Woodruff in as a pitcher- I know he pitched some in the bullpen, and Brent Brownlee has a gimpy knee right now. So, it made sense to start Demarcus in right field. We could have started Britton at second base, but he's playing bad defensively and he's not hitting much better than Frost is right now.