If you read the fine print of outfielder Chris Roberson's acquisition from the Phillies, you would have noticed that in order to make room for him on the 40 man roster, outfielder Jeff Fiorentino was designated for assignment. In the process of his removal from the 40 man roster, he was exposed to waivers and claimed by the Cincinnati Reds. Fiorentino, a 24 year old left handed hitter, spent the last two seasons at Class AA Bowie. The 2007 season saw him hit .282 with 15 home runs, 65 RBI, 68 runs scored, a .346 OBP and .445 SLG in 126 games. He projects as a 4th outfielder in the major leagues, but he'll most likely end up back at Class AA or AAA for the 2008 season.
Fiorentino has seen some playing time for the Orioles in the 2005 and 2006 seasons. It wasn't much of a sample size (only 83 at bats total), but my impressions were that he had a nice short stroke and could be a solid player. He obviously had some more developing to do, though, and that's why he's still in the minor leagues.
I have to say that I'm disappointed to see Fiorentino go, but Roberson is more likely to help the big league ball club now, so it's an understandable move.