Answer: Marcus Giles
Marcus Giles was drafted by the Atlanta Braves in the 53rd round of the 1996 MLB draft. He is the younger brother of Brian Giles who was referenced in hint #4. Giles made his MLB debut on April 17th, 2001 at the age of 22.
Brian Giles was a great player for the Indians, Pirates, and Padres. Marcus didn't fall far from the talent tree as he was a great infielder for Atlanta. He completed 6 seasons with the Braves and was named an All-Star in one of those seasons (2003).
During those 6 years with Atlanta, he had a career slash line of .285/.361/.448 with a .805 OPS and 108 OPS+. He collected 717 hits including 72 home runs and 294 RBI. Marcus also stole a total of 60 bases and walked 274 times.
Giles was non-tendered by the Braves after the 2006 season and ended up playing for his hometown team, the Padres, in 2007 alongside Brian. His MLB career basically ended after an underwhelming season in San Diego where he batted .229 through 116 games and was released by the team.
He signed minor league deals with the Rockies (2008) and Phillies (2009) but couldn't find the success he had in Atlanta again.