The top teams are always looking to sure up their bullpens at the deadline.
In the past, we've seen closers on the sellers become solid set-up men on the buyers.
Just last season, Matt Capps went from Pittsburgh to Minnesota, Chad Qualls departed Arizona and landed in Tampa Bay, and Kerry Wood went from closing for the Indians to setting up Mariano Rivera in New York.
The pool of left-handers available is rather weak, so it'll be interesting to see if a team will overpay for that coveted southpaw out of the pen.
The Cubs brass has stated that Sean Marshall is unavailable, so we'll see.
We've already seen the first big splash with Francisco Rodriguez going to the Brewers.