The Rays signed two of their seven supplemental first-rounders on Thursday, landing Washington high school lefthander Blake Snell (No. 52 overall) for $684,000 and Western Kentucky outfielder Kes Carter (No. 56) for $625,000.

Snell's bonus matched MLB's recommendation for his slot, while Carter's was slightly below MLB's guideline of $643,500 for the 56th pick.

Baseball sources indicate that Tampa Bay also is on the verge of signing two more sandwich picks, Lower Columbia (Wash.) JC righthander Jeff Ames (No. 42) and Oakland Technical HS outfielder James Harris (No. 60).

A product of Shorewood HS (Shoreline, Wash.), Snell has a fastball that has topped out at 94 mph and backs it up with a curveball and changeup that both qualify as works in progress. He had committed to Washington.

Some area scouts compared Carter's ceiling to that of Jim Edmonds. He's an athletic 6-foot-2, 205-pound center fielder with a smooth lefthanded swing, at least average power potential and slightly above-average speed.