The deal is believed to be for about $27MM over three years and with a very reachable bonus that could boost the total to $30MM. Quentin's deal includes a full no-trade clause, according to Ken Rosenthal of FOX Sports (via Twitter).
Assuming this goes down, the trading market is about to get even worse for the Pirates. Quentin was one of the names most frequently connected to the Pirates, and he was one of only a handful of good outfielders who appeared to be available.
Quentin has a .914 OPS this year, not an easy number to pull off in San Diego. He's had injury problems in the past, but he's an excellent hitter when healthy. He's currently scheduled to be a free agent after the season.