Let's take stock of each team's top trade chips, starting today with the NL West…
- Diamondbacks: Arizona moved two of its best trade chips this winter in Max Scherzer and Daniel Schlereth, and there's obviously no way Justin Upton will be moved. The cupboard is a little bare right now, but Stephen Drew could be available for the right price. He has two more years of team control left after 2010. Conor Jackson, who won't be a free agent until after 2011, could be attractive as well. Top prospect Jarrod Parker is recovering from Tommy John surgery.
- Dodgers: Matt Kemp and Clayton Kershaw are deal breakers, but Chad Billingsley could be dangled after popping up in rumors during the offseason. The 25-year-old posted a 5.21 ERA in his final 19 appearances last year, though his peripheral stats were in line with what they had been in previous seasons. He won't be eligible for free agency until after the 2012 season.
- Giants: Tim Lincecum and Pablo Sandoval aren't going anywhere and Matt Cain just signed a new extension, so Brian Sabean's best trade chip is lefty Jonathan Sanchez. The 27-year-old owns a career 9.3 K/9 and won't be eligible for arbitration until after the 2012 season. Madison Bumgarner's stock is down while he battles with Missing Velocity Disease, and Buster Posey isn't going anywhere.
- Padres: Adrian Gonzalez and Heath Bell aren't just San Diego's two best trade chips, they're among the best in the game. Gonzalez is one of the baseball's premier power hitters at age 27, and will make just $4.75MM in 2010 with a $5.5MM club option for 2011. Bell has emerged as one of the league's most dominant closers, and won't be eligible for free agency until after the 2011 season.
- Rockies: Everyone wants to get their hands on Troy Tulowitzki, but it's just not happening. Brad Hawpe is the player most likely to be moved, and there should be interest given his annual .890 OPS's and 25+ homers. He has a $10MM option for the 2011 season with a cheap $500K buyout, and Colorado has a glut of young and productive outfielders to replace him.