LMMI - Leadville Mining and Milling Corporation (fka LMMI)

[the cork]

It's a CHAMPION'S STAR, representing Michael's World Championship win in 2014. Last night was the very first time Michael has worn the STAR on his shirt and flights.

Adrian Lewis has his two World Championship wins represented by stars on his sleeves, Gary Anderson has his two World Championship wins represented on the back of his shirt with two stars, Phil Taylor has 16 stars representing his 16 World Championships on his sleeves (4 in front, for in back both arms) and Raymond Van Barneveld represents his 5 World Championships in a pin, usually circular. Jelle Klassen represents his World Championship win on the back of his collar in the middle.

There's no hard fast rule to it, and not all Champions elect to wear the STAR (Steve Beaton for example). It's a mark of prestige for Champions!