The Portland Sea Dogs became a Boston Red Sox Double A affiliate in 2003. This lot contains two Sea Dogs jerseys that are just like major league jerseys in every respect except for the team name. The white home jersey has the Sea Dogs team name in red on the front and number 21 on the back. A Russell Athletic size 54 tag is sewn on the front left tail, with a fabric content hang tag below. The red alternate jersey has the Sea Dogs team name in navy on the front and number 45 on the back. It also sports a Boston Red Sox patch on the left sleeve and a Russell Athletic size 52 tag sewn on the left front tail.