Delzine was promoted from the Florida Complex League to Single-A Salem on Tuesday.
The FCL season hasn't wrapped up yet, but the Red Sox felt it was time to challenge their top teenage pitching prospect with his first assignment to full-season ball. Delzine, a 6-foot-5 Venezuelan righty, logged a 2.72 ERA, 1.06 WHIP and 43:18 K:BB in 39.2 innings in rookie ball. The dynasty buzz will grow quite loud if he translates that success against Single-A hitters.