7:06pm: MLBTR has learned that Snell has signed for $684K, exactly slot money. He is represented by Adam Karon and Tripper Johnson of Sosnick Cobbe Sports. Baseball America's Jim Callis tweets that Carter signed for $625K, which is slightly below slot.
5:25pm: The Rays have signed supplemental first round draft picks Blake Snell and Kes Carter, reports Marc Topkin of The St. Petersburg Times (on Twitter). No word on either player's signing bonus, but MLB's slot recommendation for the 52nd and 56th overall picks is approximately $684K and $644K, respectively.
Snell, a high school left-hander from Washington, was the 52nd overall selection, taken with the pick Tampa Bay received as compensation for losing Joaquin Benoit. Baseball America's Advanced Draft Database (subs. req'd) notes that he throws 88-92 with a curveball and changeup that are "just average at best."
Carter, an outfielder from Western Kentucky, was the 56th overall selection and was taken with the pick the Rays received for losing Randy Choate. Baseball America says he flashes all five tools with a smooth lefty swing and good plate discipline. They note that his health and struggles against left-handed pitchers are a concern.
