West Notes: Upton, Bourn, Hairston, Clemens

The Giants expect to begin discussing a "blockbuster extension" with Buster Posey this spring, but that's not the only news coming out of baseball's Western divisions…

• Grantland's Jonah Keri wonders if the Diamondbacks lost leverage in Justin Upton trade negotiations after their deal with the Mariners fell through. Keri also examines several trades from the past 30 years in which a well-regarded player who had fallen out of favor with the franchise was traded.
• The Rangers are "keeping the lines of communication open" when it comes to free agent Michael Bourn and trade candidate Justin Upton, tweets Jon Paul Morosi of FOX Sports. If either's price comes down to the liking of GM Jon Daniels, Texas is prepared to take action.
• Jerry Hairston Jr. is in the final year of a two-year, $6MM contract, and he told Dylan Hernandez of the Los Angeles Times that he'll retire if the Dodgers win the World Series this season. Hairston already has one World Series ring, having been a part of the 2009 Yankees and says "you can't get any better" than retiring after a World Series win.
• Roger Clemens sat down with CSN Houston's Steve Bunin to discuss his 2013 role with the Astros and confirmed again that he will not pitch next season. Clemens said he would've had to start training in November to make a serious run at a comeback. Instead, he'll help Houston by mentoring their young arms in Spring Training. For the time being, he's not interested in a full-time role with the organization, however.
• Wendy Thurm of Fangraphs takes a look at a potential Posey extension and notes the risk involved in doling out a massive contract for a player whose career only includes 1255 plate appearances to date.