Carlos Guillen was a Venezuelan professional baseball player who played in Major League Baseball (MLB) for over a decade. He began his career as a shortstop for the Seattle Mariners in 1998 and played for them until 2003. During his time with the Mariners, Guillen was known for his solid defense and consistent hitting. He was also a key player in the team's 2001 playoff run, where they made it to the American League Championship Series.

In 2004, Guillen was traded to the Detroit Tigers, where he played for the next eight seasons. With the Tigers, Guillen continued to be a reliable player, both offensively and defensively. He was named to the All-Star team three times (2004, 2007, and 2008) and won a Silver Slugger award in 2004. In 2006, Guillen helped lead the Tigers to the World Series, where they ultimately lost to the St. Louis Cardinals.

Throughout his career, Guillen battled injuries, including knee and shoulder problems. In 2011, he announced his retirement from baseball due to ongoing injury issues. Despite his injuries, Guillen was a respected player and teammate, known for his work ethic and leadership on and off the field.

Overall, Carlos Guillen had a successful career in MLB, playing for two different teams and earning numerous accolades. He finished his career with a .285 batting average, 124 home runs, and 660 RBIs. Guillen's contributions to the Mariners and Tigers helped both teams achieve success during his time with them.