When Peter Mueller has been healthy, he's shown himself to be a highly-skilled NHL forward.
Staying healthy, however, has been a major issue the last three seasons, and likely was part of the reason the Colorado Avalanche on Monday declined to give the restricted free agent a qualifying offer, making him an unrestricted free agent July 1.
Taken by the Phoenix Coyotes with the eighth pick of the 2006 Draft, Mueller broke into the NHL the following season. His 22 goals as a rookie were second only to Chicago's Jonathan Toews, and his 54 points trailed only Chicago's Patrick Kane and Washington's Nicklas Backstrom.
He slumped to just 13 goals the following season, and after a slow start to the 2009-10 season, the Coyotes traded him to the Colorado Avalanche on March 3, 2010.
The change of scenery lit a fire under Mueller, who had nine goals and 11 assists in 20 games. That hot run ended April 4, 2010, when he suffered a concussion on a hit by the San Jose Sharks' Rob Blake.
He was close to returning when the 2010-11 season started, but he suffered another concussion in his first preseason game -- Mueller said he was hit by a stick in the left temple, the same place he was injured on the Blake hit -- and that led to him sitting out the entire 2010-11 season.