Why did Calvin Borel get disqualified in 2012 Kentucky Derby?

He was not disqualified and he was not drunk!If you scroll to about 3:50 into this replay video and let it play through the 4 minute mark you will see the listing for Calvin is DIS.

YouTube.com/watch?v=qVoASaWVG8k

Like you I thought disqualified but I asked why in a horse racing game forum and one of the members replied with the following answer

Calvin finished 19th (next to last), per the DRF results chart. No mention of disq. Perhaps you saw "dist" which would mean distanced (behind so many lengths of the next horse they didn't calculate # of lengths).

Hope that answers your question. Calvin wasn't disqualified just came in really late in the race compared with other horses except 1 who came in behind him.