According to John Sickels, at minorleagueball.com, this kid by the name of Wynn Pelzer is a sleeper prospect... I'm guessing this is not the type of sleeper that could have a big impact in 2009, but more of a guy that could appear near the top of the padres top-prospect list in the future...
Anyways, here's what Sickels has to say:
Wynn Pelzer, RHP, San Diego Padres
A ninth round pick out of the University of South Carolina in 2007, Pelzer went 9-6, 3.19 with a 100/32 K/BB in 118 innings for Fort Wayne in the Midwest League in '08, credible though not terrific performance. But it is better than what he did in college, where he struggled with his command, and scouts point to a 91-94 MPH fastball as a sign of potential. His breaking ball is also quite good, but his changeup and splitter need work, and his command within the strike zone is still wobbly. I saw him pitch in college and was impressed with his arm strength, and I still think he's got significant development potential.
To read about the rest of the sleepers in the nl west, jump