It is true that PNC park is just about the hardest park in the majors for a RHB to homer, but Victory Field in Indy and Blair Co Ballpark in Altoona have similar dimensions, and Lynchburg is also a tough HR park.

I ran MLEs for the Pirates, matching Indianapolis with Pittsburgh, Altoona with Pittsburgh, etc for players who had played both places since PNC opened.

Pearce's 2007 (at 4 levels) translates as 309/365/562 78w/150k, while his career minor & major (including 2008) is 280/341/530 76w/180k

His breakout 2007 looks very similar to the past few years of Aramis Ramirez, while his career numbers look quite a bit like Adam LaRoche.

For fielding, Dan Fox's SFR had Pearce at +5.9 runs at 1b in 2007, 2nd best among minor 1b to Daric Barton.

Worst case, the Pearce is likely a RH Adam LaRoche.