MLBers - Simply put, players who are, or have been in the majors. I did not set an innings or plate appearances limit, so Reid Brignac and Carl Crawford are weighed equally. I did not count Jason Hammel twice.
T10 Rounds - Pretty self explanatory, these are the players selected in the first 10 rounds of the draft. Not just the Rays top 10 picks.
With Rays - This is to say with the Rays when they debuted, not currently with the Rays.
Now, I know some people prefer cold and hard data, so here are the tables with this same information. Note: "Total" is the amount of players drafted that year.
For those too lazy to add those columns up, here are the totals:
Take 2006 and 2007 out of the equation and we get...
It's hard to evaluate this information. I don't know the league average over these years, and while the raw numbers look poor, hitting on ~10% of your draft picks seems fair.