Nationals Notes: Detwiler, Peavy, Rizzo

Nationals starter Ross Detwiler's lingering lower back strain could lead the Nats to acquire a starting pitcher before the deadline, according to Adam Kilgore of The Washington Post, who says some rival executives have expected the team to try to acquire a starter since Detwiler hit the DL early this month. The White Sox's Jake Peavy could be a potential target, some close to the club say, as the righty is under control beyond 2013 and GM Mike Rizzo tends to avoid trading prospects for only a few months of a player's services.  Some more Saturday evening Nationals links:

• Johnson confirmed that the club isn't interested in a rental, tweets Mark Zuckerman of CSNWashington.com (link). Rizzo also adds that he plans to monitor Detwiler's progress for awhile longer before deciding on whether the Nats need to make a move. “If Detwiler is healthy, that helps me make any and all decisions we have to make," he said. 
• Rizzo has no plans to acquire a replacement for struggling left-handed bench bat Chad Tracy via trade, Kilgore Tweets. "Tracy is a good left-handed pinch hitter," Rizzo said. "Theres no doubt about that."
• In an article for MASNSports.com, Dan Kolko suggests that Rizzo should try to put together a deal for a left-handed version of Scott Hairston, whom the Nats acquired from the Cubs earlier this month. Tracy's .149/.187/.276 line represents a significant drop from his production in 2012, when he hit .269/.343/.441 off the bench and provided the team with several big hits. "I'm a veteran guy, I've been through it before," Tracy said of his struggles. "I should be able to make the adjustment and I just haven't done it."