The Celtics have picks Nos. 21, 22, and 51 in the NBA Draft, which takes place this Thursday, June 28. Danny Ainge (right) and Doc Rivers will attempt to transform an aging Celtics roster into one geared toward the future, and size is a definite need. There are two schools of thought in this draft. One is that there will be talent available late, and the other is that the top of the draft is loaded, and that trading into it is a must. With three picks to work with, the Celtics could take advantage of either. With that backdrop, we take a look at players who could be Celtics soon.