6:24pm: Nats GM Mike Rizzo will neither confirm or deny the club's interest in Oswalt, according to Adam Kilgore of the Washington Post.
Kilgore writes that even if the Nationals are interested, it is unlikely a deal could be struck between the two sides. First, Washington would have to be willing to part with farmhands that they have worked diligently to stock. Secondly, they would have to take on Oswalt's hefty contract.
Finally, Oswalt would have to approve a deal to the nation's capital. Despite the fact that the Nats appear to be contenders at present, Kilgore wonders how the 32-year-old feels about a club that has lost more than 100 games in back-to-back seasons.
12:58pm: A baseball source tells MLB.com's Bill Ladson that the Nationals are interested in trading for Oswalt.
12:27pm: Roy Oswalt's trade request has inspired plenty of speculation about potential suitors for the right-hander. Here's a roundup of the latest discussion about possible trade partners for the Astros:
- Dodgers GM Ned Colletti to Fanhouse's Tom Krasovic: "I sense we'll be in the market for pitching after the All-Star Break." Bill Shaikin of the Los Angeles Times wonders if that means the Dodgers might be in on the Oswalt sweepstakes.
- Lacking a true ace, the Twins could kick the tires on Oswalt, according to Joe Christensen of the Minneapolis Star Tribune.
- Over at The Newberg Report, Jamey Newberg breaks down all the obstacles in the way of Oswalt wearing a Rangers uniform.
- Jim Bowden tweets that Los Angeles, Minnesota, and Texas are among the most realistic destinations for Oswalt.