4:34pm: The Pirates have inquired on Aaron Heilman as a reliever, MLBTR has learned. Dejan Kovacevic of the Pittsburgh Post-Gazette reports (on Twitter) that the Pirates are not targeting Matt Guerrier.
1:42pm: The Pirates are showing interest in and making offers to a number of free agent relievers, tweets Ken Rosenthal of FOX Sports. He says they were in on J.J. Putz before he reached an agreement with Arizona and are looking at guys like Kevin Gregg. I'm told the Pirates showed lukewarm interest in Hiroyuki Kobayashi, only on a minor league deal.
The Pirates already have Evan Meek and Joel Hanrahan as closer candidates, so it appears they're trying to once again build a late-inning reliever surplus. It worked well with Octavio Dotel this year.