To make room for Hill on the 40 man roster the Jays have designated Eric Crozier for assignment.
Hill was the Jays first round pick from LSU in 2003. He has played SS exclusively for the Jays minor league teams, although many people believe he'll eventually shift over to 2B or 3B. Hill did play 10 games at 3B in the Arizona Fall League this past offseason so it's certainly a possibility that he'll get time at the hot corner in Koskie's absence.
Prior to this afternoon's game, in which he hit a homerun, Hill was batting .303/.337/.454 with 10 errors for the Chiefs.