I could be wrong, but I just can't see the Rays trading for an upper minors outfielder this year. They have J.Lowe manning RF, and he's a 5 tool, everyday player with 4+ fWAR potential every year he stays healthy. K.Misner is looking more and more set at CF, playing a very good defense the Rays expect at the position and swinging a pretty decent bat for CF too. That leaves LF for C.Simpson (who the Rays are excited about and are forcing into the lineup because the dude is electric on the bases), C.Morel (a total bust that this Rays fan wanted no part of, but who the Rays may not be able to part with because of the cost paid to get him), J.Deluca (the presumed CF of the future before he messed up his shoulder and gave Misner an opening), and guys like J.Mangum, R.Palacios and J.Caballero. Rays need to trade 1-2 of these guys as is, so adding Caissie doesn't really work, particularly because he's a lefty (as are most of the current Rays' outfielders, including all 3 of the presumed starters - Simpson, Misner and Lowe).