The Pirates designated Brandon Moss for assignment to make room for waiver claim Hayden Penn, reports MLB.com's Jenifer Langosch.
Moss, 26, hit .236/.304/.364 in 424 plate appearances for the Pirates last year, playing both outfield corners. Moss is out of options, so he'll have to clear waivers if he's to be sent to the minors. He joined the Pirates at the '08 trade deadline along with Craig Hansen, Bryan Morris, and Andy LaRoche, with the Pirates giving up Jason Bay.
Pirates GM Neal Huntington recently admitted to WEEI's Alex Speier that in hindsight, there was a better deal on the table for Bay. Moss and Hansen have not panned out, and as Speier says, "the value of the deal for Pittsburgh will be determined largely by what happens with LaRoche and Morris."