Tim Raines Jr. is probably best remembered by O's fans as having played in the final game of the 2001 season with his more accomplished dad, Tim Sr.. On October 3, 2001, Senior had signed a one day contract with the Orioles for the chance to play in a game with his son, who had just made his MLB debut two days earlier on October 1. Tim Jr will forever be Oriole #699, while his dad is lucky #700. The Raines' were just the second father-son duo to play for the same team at the same time following the Griffeys'.
While his dad's tenure with the Orioles lasted just that one game, Tim Jr. went on to play in 75 games for the Birds over three seasons, in 2001 and 2003-04. He never did much to distinguish himself at the major league level, but he continued to play professional baseball through the 2011 season. He spent most of the past three seasons in the independent Atlantic League, including the past two under his father's tutelage with the Newark Bears. I don't see any stats for him in 2012 so it's possible that he has finally hung up his spikes.