If you show up to practice drunk, there is a lot wrong with the player. A college, high school, pro, middle school, semi-pro, pee-wee league player knows not to show up to practice drunk. If he did this then he's a borderline loser and will soon be out of the league as people rarely develop discipline in the pros that they lacked in college. Not impossible, but rare. Don't need a coach on this issue because the player ahs bigger issues than a coach can fix.
If a coach lies about a player being drunk, the coach is a borderline loser and should never coach again at any level (see levels listed above).
FYI, it is pretty dumb for Brevin to expose this information, whether true or not. We will never know whether Diaz said these things, but now all of us are left wondering if Brevin showed up to practice drunk. Sometimes the rumor/innuendo is as bad as the truth, which in this case will never be revealed. Brevin screwed himself with this and does not even know it. Dumb, dumb, dumb.