Who is Justin Christian

As some of you who were watching yesterdays game may have seen, there was a new face in the outfield. It was Justin Christian, the 28 year old who was called up before yesterdays game, while Traber was sent down.
Christian was imidiately propelled into the left field spot due to some minor injuries to Damon and Matsui. He had a ruff first few inning with an error and an out in his first at bat, but he recovered nicely with a single and then a 2 rbi double.
Christian was in AAA Scranton batting .309 with 18 steals, along with 4 homers, and 39 rbi's in 55 games.
Christian was playing independant league ball, until 2004 after going undrafted. Then he played in the Yankees minor league gulf coast team, and worked his way up the system untill he reached his goal of the majors.