Walter Pennington: Everything you need to know

Pennington cleared waivers and was outrighted to Triple-A Norfolk on Friday, Roch Kubatko of MASNSports.com reports. The 27-year-old was designated for assignment by the Orioles earlier this week but will stick in the organization after passing through waivers unclaimed. Pennington spent just over a week in the big leagues but didn't see action for Baltimore.

The Orioles designated Pennington for assignment Wednesday, Jake Rill of MLB.com reports. Pennington has made two appearances in the minors this season, during which he's given up five earned runs in one combined inning between High-A Aberdeen and Triple-A Norfolk. While he continues to work on his mechanics in the minors, he'll give up his spot on the Orioles' 40-man roster for Luis F. Castillo, who was acquired from the Mariners on Wednesday.

The Orioles claimed Pennington off waivers Monday, Jake Rill of MLB.com reports. Pennington hasn't pitched this season, but he was working on his mechanics with Triple-A Round Rock before the Rangers designated him for assignment this past Wednesday, per Jacob Calvin Meyer of The Baltimore Sun. Pennington will report to Triple-A Norfolk and could be called up to the majors should Baltimore need to bolster its bullpen depth with a southpaw.