Game 668 | January 30, 2006 | Joe Mauer, Jesse Crain
The Twins invited two of their top young players to Dunkers before the team left for spring training in Florida. For Mauer; 2006 was to be a great season as he led the major leagues with a .347 batting average. Crain proved to be an effective “Set-up" man to closer Joe Nathan, appearing in 68 games with a 3.52 ERA. The team won the American League Central Division and was swept in three games by the Oakland Athletics in the American League Division Series.

Game 710 | January 28, 2008| Joe Mauer, Justin Morneau
Arguably the most popular pair of players in Twins history, the "M&M Boys" appeared together at Dunkers before leaving for spring training in Florida. Mauer, from St. Paul, won the American League batting title in 2006 and again in 2008. British Columbia-born Morneau was the American League's MVP in 2006 and, before a huge international television audience in 2008, won the Home Run Derby held the day before the All Star Game.

Wikipedia - Joe Mauer