7:24pm: The Rockies have placed Giambi on the disabled list, reports Renck (Twitter links). He's unlikely to be traded before the deadline (players can be traded while injured, though it's rare), but Renck mentions that Giambi could be a waiver trade candidate in August.
TUESDAY, 10:16am: Giambi injured his left quad last night, and Renck says it's a potential disabled list situation. That could end the chances of a July trade. In another article, Renck explains that the Phillies "called about Giambi before this road trip and are expected to circle back soon," while the Pirates "are considered long shots."
MONDAY, 3:57pm: The Phillies are interested in Rockies first baseman Jason Giambi, tweets Ken Rosenthal of FOX Sports. The Pirates have interest as well, tweets Troy E. Renck of the Denver Post. Giambi isn't looking to leave, but if he asks to go to a contender, the Rockies will help that happen, Renck reports (on Twitter).
Giambi, 40, has made the transition to useful bench player since joining the Rockies. This year he's hitting .263/.360/.632 with ten home runs in 111 plate appearances.